Dylan McDermott and Maggie Q Split Following 4-Year Engagement

Dylan McDermottand Maggie Q have split.Four years after theAmerican Horror Storyactor andDesignated Survivoractress got engaged, the couple is going their separate ways, a source confirms to PEOPLE.Reps for McDermott and Q have not commented.They first sparked relationship rumors in fall 2014, when McDermott, 57, and Q, 39, were spottedgetting cozywhile shopping in Brentwood.In October of that year, a show insider told PEOPLE that theStalkercastmates were romantically involved.Dia Dipasupil/GettyJust months later, the pair was engaged — he proposed after seven weeks — and Q was sporting amassive diamondon her ring finger.

Dylan McDermott Celebrates 35 Years of Sobriety: It's My 'Greatest Accomplishment'

Dylan McDermottis celebrating 35 years of sobriety.McDermott posted a touching Instagram on Monday, calling the anniversary his “greatest accomplishment.”“Today is my Sober Birthday. 35 years! Staying sober has been my greatest accomplishment,” wrote the actor, 57. “I say that because I was able to show up for myself in every way possible. In the most turbulent and best of times I had the rock of the 12 steps to guide me.

Dylan McDermott Joins 'FBI: Most Wanted' as a 'Charming' New Character — See the First Look

Photo: Mark Schäfer/CBSMake way for a new agent.PEOPLE has the exclusive first look atDylan McDermott’snew character onFBI: Most Wanted. The actor, 60,takes on the role of Supervisory Special Agent Remy Scott — the newest head of the FBI’s Fugitive Task Force.As the FBI agents grieve the death of their leader Jess LaCroix (Julian McMahon), the “charming” Remy will take over as head of the department. McDermott will make his debut in the April 12 episode, titled “Covenant,” in which Remy will bond with his new team over bagels, drinks and axe throwing.

Dylan McDermott Teams Up with Daughter Colette for 'FBI: Most Wanted' : 'She's Got the Whole Package'

Photo: Stefanie Keenan/GettyDylan McDermottis a proud dad both on and off the screen.On April 11, the actor is introducingFBI: Most Wantedfans to his daughter whenColette McDermottjoins as Carly Cassidy, a college student with ties to the task force’s latest case.In “The Miseducation of Metcalf 2,” Dylan’s Remy Scott and theMost Wantedteam search for two missing coeds after Carly’s older brother is involved in a homicide that happened in their dorm room.

Dylan McDermott Teases 'Greatest Crossover Event Ever' Ahead of 3-Hour 'FBI' Episode (Exclusive)

Photo: Bennett Raglin/CBS Dick Wolfis turning Tuesday night television into a federal case — literally. The longtime producer is uniting his three CBS dramas —FBI,FBI: InternationalandFBI: Most Wanted— for a “global crossover event” on Tuesday, andFBI: Most WantedstarDylan McDermottis teeing up quite the evening. “It’s an amazing cast on all the shows — an incredible storyline — us working as a unit. I thought it was really fun. I think it’s going to be an incredible three hours,” he tells PEOPLE exclusively.