Credit: Jeff Kravitz/FilmMagic

It's a great week for Peter Facinelli! The Twilight star is engaged to his girlfriend of three years Thor actress Jaimie Alexander, People confirmed.

And what a proposal: Facinelli asked her to be his bride at the top of the Empire State Building on Monday. Alexander, who met her future husband on the set of 2011's Loosies, shared a gorgeous snap from the big moment at one of New York City's greatest landmarks. She captioned the photo with, "Top of the world with my love."

Peter Facinelli and Jaimie Alexander
Credit: Jeff Kravitz/FilmMagic

This is Alexander's first marriage and the second for Facinelli who was married to 90210 actress Jennie Garth for 11 years. He has three daughters with Garth: Luca Bella, 18, Lola Ray, 13, and Fiona Eve, 8.

The couple, who also worked together on the show Nurse Jackie, are each busy with new projects for NBC right now. Facinelli will star on American Odyssey and Alexander is shooting thepilot for Blindspot.

Congrats to the happy couple!