Peter Facinelli is engaged!

The Nurse Jackie alum, 46, proposed to his actor/writer girlfriend Lily Anne Harrison during their holiday getaway in Mazatlan, Mexico, PEOPLE can exclusively announce.

The actor proposed while the couple was at a romantic beach dinner at the Estrella Del Mar Beach and Golf Resort. They were joined by Facinelli’s daughters, whom he shares with ex Jennie Garth — as well as Harrison’s parents for the exciting celebration.