It may be 3 years since Nickelodeon's Big Time Rush has gone off the air, but actor James Maslow hasn't forgotten his co-star Ciara Bravo's birthday! Ciara was born on March 18, 1997, and today she turns 19-years-old.

James took to Twitter to wish his former co-star a HBD, and he's totally shocked at how much she's grown up since the show started back in 2009! See James' Tweet:

Aww, we love this BTR reunion via social media, and we hope the entire cast meets up in person soon.

What do you think of James' birthday note? Be sure to wish Ciara a very happy birthday in the comments below!