鈥 Baby one more time, indeed: Jamie Lynn Spears is going to be a momma twice over! Britney Spears鈥 little sis confirmed the exciting news on Instagram this morning that her daughter, nine-year-old Maddie, will become a big sister in 2018!

鈥淟ooks like we are starting off 2018 with another big milestone,鈥 she wrote. 鈥淪ooo happy to announce that Maddie is FINALLY going to be a big sister.鈥

The post was the 26-year-old鈥檚 final installment in a 鈥12 Days of JLS鈥 countdown, in which she shared 12 milestones from her life, including her marriage to husband Jamie Watson in 2014 and the first time she ever performed on the Grand Ole鈥 Opry stage.

In her most recent upload, Spears also addressed the horrific ATV accident Maddie suffered back in February, which saw her 鈥渁lmost losing鈥 her little girl. 鈥2017 was filled with some of the biggest challenges of my life, as well as some of the biggest blessings, so I made a choice to lay low this year to focus on truly becoming my best self as a person and as an artist,鈥 she wrote.

鉂わ笍3.14.14鉂わ笍 #12DaysofJLS

A post shared by Jamie Lynn Spears (@jamielynnspears) on

It appears as though there was some light at the end of her tunnel, however, with the 鈥淪leepover鈥 singer revealing, 鈥淒uring that time, I continued working on my music and telling my story, which has created some of my most honest work and I CAN鈥橳 wait to share that with you all very soon.鈥

She continued on to say that 鈥2018 is going to be filled with many milestones, both personally and professionally. I appreciate each of you for your patience and support through it all. 2018 has a lot coming, so GET READY.鈥

The baby will be Spears鈥 first child with Watson.

Congratulations to the happy couple!

What do you think Jamie should name baby number two? Share with us over @BritandCo.

(Photos via Jason Merritt + Michael Loccisano/Getty)