News broke on Friday that Dermot Mulroney will leave NBC’s “Chicago Fire” in its upcoming 15th season. During a recent appearance at Flash Weekend Chicago Horror Convention (via People), Mulroney opened up about his exit.

“Loved every minute of it. Became friends with this incredible crew of people,” Mulroney said. He later noted that the show gave him some “incredibly challenging scenes,” but luckily, he had an “incredible cast” to back him up.

The “My Best Friend’s Wedding” star explained that he only has one more episode left in Season 15, and then “they write the character off.” He said of his time on “Chicago Fire,” “We gave it our all for two seasons.”

“They wrote an incredible storyline that put me as an actor on [a] high challenge,” Mulroney added. “I loved every minute of it. Sad to see it go.”

Mulroney joined “Chicago Fire” in Season 13 as Chief Dom Pascal. His exit is expected to come early in Season 15, which premieres on Oct. 7 at 9 p.m. ET.