The Nurse Jackie actor, 42, and the Thor: The Dark World actress, 31, released a statement to People announcing their separation.
“Due to conflicting family and work commitments on opposite coasts, and after much consideration, Peter and Jaimie have chosen to part ways amicably and remain good friends,” the actors’ reps told the magazine.
Facinelli popped the question to Alexander in a very romantic way, on top of Empire State Building, last year in March.
Last month, the couple made their appearance at the 73rd Annual Golden Globe Awards. Alexander took to Instragram and shared a photo of Facinelli from the event, with the caption, “My hot date.”
Peter Facinelli was previously married to Jennie Garth, with whom he has three daughters, Luca Bella, 18, Lola Ray, 13, and Fiona Eve, 9, for 11 years. Their divorce was finalized in June 2013.