Billie Eilish is celebrating her journey to stardom.

RELATED: Billie Eilish Is Joined By Alicia Keys To Belt Out ‘Ocean Eyes’

In celebration of her 18th birthday on Wednesday, Eilish shared a one-minute throwback video to Twitter. Her older brother and frequent collaborator, Finneas O’Connell, makes several cameos in the cute clip.

“Hi, my name is Billie and I’m going to play a song that I made up with this guitar,” a pint-sized Eilish says in the video.

It was a massive year for the young singer, whose debut studio album When We All Fall Asleep, Where Do We Go? topped the charts in nearly two-dozen countries. Eilish is also nominated for two Grammys: Album of the Year and Best Pop Vocal Album.

RELATED: Billie Eilish Pays Tribute To Her Brother Finneas O’Connell

Happy Birthday, Billie!