— Dave Abrams (@DeabramsLA) February 28, 2015
Garth and Abrams’ reps confirmed the engagement to People magazine.
“Dave had been working on this for months, and really wanted to plan something special for her around her birthday and make it perfect,” a source told de mag.
The actor wished Garth a “Happy Birthday” for her 43rd birthday on his Twitter account, adding a sweet hashtag “#loveumoreandmoreeachday.”
The former Beverly Hills, 90210 star has been dating the actor since last fall.
Recently, her former husband Peter Facinelli, with whom she has three daughters, Fiona, 8, Lola, 12 and Lola, 17, proposed to his girlfriend Jaimie Alexander.