Of all the titles in the world, one of the most difficult, but arguably rewarding, has got to be that of 鈥渕other鈥 or 鈥渇ather.鈥 It鈥檚 a job that鈥檚 even tougher when it鈥檚 done without a partner, leaving all the more difficult parts of the experience on the shoulders of just one person. Today, on National Single Parent Day, we鈥檙e tipping our hats to all the single moms and dads (holla!) out there that have sacrificed everything to provide the best life possible for their little tykes. Below, find our homage to 13 single celebrity parents that have made it look like a breeze, even if they鈥檙e barely holding it together (like working mom Scarlett Johansson just copped to). Here鈥檚 to you, guys.

1. Sandra Bullock: Sandra Bullock had initially filed papers to adopt her seven-year-old son Louis Bardo Bullock with now ex-husband Jesse James. The young boy was even living with the couple as a family for four months following his birth. Bullock and James abruptly separated, then divorced, but the Miss Congeniality star wasn鈥檛 about to give up her newly crowned title as a mother. She legally adopted Louis as a single parent, adding a baby girl named Laila to the mix back in 2015.

2. Michelle Williams: Williams famously lost her partner, Heath Ledger, back in 2008. The My Week With Marilyn star has since opened up about the difficulties of raising their now 11-year-old daughter on her own, telling Porter magazine late last year that 鈥渇or pretty much everything else, I鈥檓 a believer in not fighting circumstances, accepting where you are and where you鈥檝e been. In all senses but one 鈥 I would be able to totally go down that road of thinking were it not for Matilda not having her dad. You know, that鈥檚 just something that doesn鈥檛鈥 I mean, it just won鈥檛 ever be right.鈥

3. Sheryl Crow: Like Bullock, Crow forged ahead with her urge to start a family even after splitting from her former fianc茅, cyclist Lance Armstrong. She adopted her now nine-year-old son Wyatt roughly one year after the couple went their separate ways, and six-year-old son Levi followed in 2010. 鈥淚 had to let go of this picture I鈥檇 always painted about my life, about how it was going to be set up with a husband, a house, and all that,鈥 she revealed to Health magazine in 2012. 鈥淎t the time I was considering adopting, everything else had sort of not worked.鈥 The singer went to say, 鈥淲hen you let go of the story you tell, a lot of times it creates a whole world of expansion for other things to come in. And I always knew that I wanted to be a mom, so I just had great faith that when that little person found me, that I would be ready and everything would be fine.鈥 (Photo via Jason Merritt/Getty)

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4. Liam Neeson: Fans of Love Actually know Liam Neeson鈥檚 character Daniel as the lovable widower who encourages his son Sam to follow his heart at any cost, but few may be aware that Neeson actually ended up living out his character鈥檚 storyline IRL after his wife of 15 years, Natasha Richardson, passed away just six years after the film鈥檚 release. The late actress had a fatal ski accident, leaving Neeson to raise their two sons, Micha茅l and Daniel (then 13 and 12) on his own. 鈥淚t鈥檚 an ongoing joy being a dad,鈥 he said while speaking to The Daily Mail in 2012. 鈥淚t鈥檚 always a joy, but it鈥檚 a joyful worry.鈥

When the guy you love thinks you're cray but kisses you anyway

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5. January Jones: Jones gave birth to son Xander in 2011, though she has never revealed the identity of her child鈥檚 father. After six years, however, the Mad Men actress seems to have the whole single mom thing down pat, telling Red magazine just several months back that despite attempts from others to set her up with someone, 鈥淚 just don鈥檛 feel I need a partner. Do I want one? Maybe. But I don鈥檛 feel unhappy or lonely.鈥 She certainly doesn鈥檛 have any regrets about the way things turned out, saying, 鈥淚 don鈥檛 believe in regret. I just try to be a better person. Try to be a better mum. Maybe it鈥檚 an ego thing. But I think even missteps are done for a reason.鈥

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6. Cristiano Ronaldo: Ronaldo, like Jones, has never revealed the identity of his seven-year-old son Cristiano鈥檚 mother, but did announce via Facebook that he would be raising the boy on his own with full custody. His single dad status doesn鈥檛 seem to bother the soccer star, who spoke out about being a father in the 2015 documentary, Ronaldo. 鈥淚t was always my dream to have a child young, when I was 25,鈥 he said. 鈥淟ots of people don鈥檛 have either a mother or a father. Having a father is enough.鈥 Fair point!

7. Ricky Martin: The 鈥淪hake Your Bon-Bon鈥 singer became a single daddy twice over with the birth of his twin boys, Matteo and Valentino, via surrogate back in 2008. Martin seemingly took to single fatherhood like a fish to water, telling radio host Luisa Fernanda back in 2014 that if it were up to him, he鈥檇 have up to four more children, preferably daughters. 鈥淚f you ask me if I want to be the father of a little girl, [I鈥檒l say] not one, but four! I鈥檓 just getting started with this fatherhood thing and I鈥檓 going for more.鈥 As the former Menudo band member, who has since found a partner in fianc茅 Jwan Yosef, explained, 鈥淚 come from a big family and I like noise and chaos in my house.鈥 (Photo via Getty)

Happy Independence Day! #freedom Photo credit @beauflynn

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7. Connie Britton:Nashville鈥檚 most beloved character was not only a fantastic mom on the hit CMT show, but she also raised her adopted son Eyob (AKA鈥淵oby鈥) entirely on her own. Though the actress admitted to Redbook several years back that the situation wasn鈥檛 ideal for her, saying, 鈥淚 would love to be doing this with a partner, and I want Yoby to have a father figure,鈥 she also said that she wouldn鈥檛 subject herself or a relationship to that kind of pressure. As for life with her six-year-old, Britton said that while she鈥檚 鈥渃onstantly being pulled in different directions,鈥 it鈥檚 not all bad. 鈥淲hen you鈥檙e doing it on your own, you don鈥檛 have to [argue over] how you鈥檙e raising the kids.鈥 Touch茅, Britton. Touch茅.

8. Larry Birkhead: Perhaps the most famous daddy/daughter duo on our list is that of Larry Birkhead and his daughter, Dannielynn. Birkhead famously fought tooth and nail to be named as the rightful father of his little girl after his paternity was contested by another of his late partner Anna Nicole Smith鈥檚 rumored paramours, lawyer Howard K. Stern. Smith passed away in 2007 as the result of a prescription medication overdose. Dannielynn鈥檚 rightful daddy appeared on Steve Harvey last summer to talk about his experiences, saying that it had been a 鈥渘on-stop whirlwind. I make it as normal as I can鈥 she鈥檚 like any other kid; she goes to school with every other kid and she鈥檚 a Girl Scout. She does things that I think her mom would be really proud of her for.鈥 *Tear*

9. Padma Lakshmi: Lakshmi documented her journey from being a child raised by a single mother to raising a daughter on her own in her 2016 memoir, Love, Loss, and What We Ate: A Memoir, and has spoken on the issue at length in interviews, as well. 鈥淚t鈥檚 the only way of life I鈥檝e known,鈥 she reportedly told the New York Post. It鈥檚 not a title Lakshmi particularly minds, however: 鈥淚 was told I couldn鈥檛 have children, so every day, I am kissing the sky with happiness about it.鈥 The Top Chef host doesn鈥檛 take all the credit, though. 鈥淚鈥檓 very privileged,鈥 she said. 鈥淚 have a lot of hands helping me鈥 my nanny is awesome.鈥

10. Elizabeth Hurley: Elizabeth Hurley didn鈥檛 receive much any support from son Damian鈥檚 father, Steve Bing, when she gave birth to him back in 2002 鈥 in fact, Bing forced the family to undergo a paternity test to prove he was the rightful father. Though Hurley has reportedly admitted to ES magazine that being a single parent isn鈥檛 always all it鈥檚 cracked up to be (鈥淚鈥檝e been a single mother once and I鈥檓 sure every single mother in the world would agree with me 鈥 it sucks鈥), the Austin Powers: International Man of Mystery actress has never wavered in her dedication to her son. 鈥淚t鈥檚 not easy, but my philosophy has been for the past 11 years since having my son, is that he comes first. And that鈥檚 easy. I鈥檓 never torn about it,鈥 she told Rescu in 2014. (Photo via John Phillips/Getty)

11. Patton Oswalt: Oswalt became a single dad rather unexpectedly when his wife, Michelle McNamara, died in her sleep at just 46 from what Oswalt says was a combination of an unknown heart condition and medications. The comedian got real about his new unfamiliar territory with Conan in September of last year, saying, 鈥淚鈥檓 a widower. And if I put it in really basic terms, I鈥檓 like every bad 鈥80s sitcom where there鈥檚 a dad raising a kid by himself鈥 except my 鈥80s sitcom sucks.鈥 Despite his funnyman status, however, Oswalt revealed that the laughs hadn鈥檛 been rolling for him as of late, going on to say, 鈥淭here鈥檚 no punch lines. There鈥檚 a lot of insomnia. There鈥檚 a lot of me eating Cheetos for dinner.鈥 (Photo via Jesse Grant/Getty)

12. Joe Biden: Former Vice President Joe Biden may be best known these days for his role as the former Vice President to President Barack Obama (along with the hilarious internet memes that swept the internet during their time in office, now potentially being immortalized in film), but for his sons Beau and Hunter and daughter Ashley, he鈥檚 best known as 鈥淒ad.鈥 That title was especially important, perhaps, following the 1972 car crash that tragically killed his first wife, Neilla, and their 13-month-old daughter, Naomi. Biden took his oaths in the Senate just one year later, reportedly commuting from Washington to Delaware nightly to be with his kids as their sole source of support. Biden remarried in 1977 with his current wife Jill, and it would seem that he鈥檚 done alright by his three kids 鈥 his youngest is now 35, and just debuted her first collection at NYFW. (Photo via David McNew/Getty)

13. Charlize Theron: Though the 41-year-old was briefly engaged to actor Sean Penn back in 2014, her journey of motherhood has largely been a solo one since she first adopted her son Jackson back in 2012. She spoke about juggling her work and home life with The Today Show then, saying that while taking him along for Snow White & the Huntsman press tour, she鈥檇 become an expert diaper changer. 鈥淚 can do it in my sleep now. I am so good鈥 I鈥檓 like the diaper pro,鈥 she quipped. So good, was Theron, in fact, that she went on to adopt another baby; a daughter named August. 鈥淐hoosing to be a mom in my late 30s has been really great for me,鈥 she divulged to W magazine that same year. 鈥淚t鈥檚 given me perspective.鈥

Which single celeb parent quote do you relate to most? Share with us @BritandCo.

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