United Kingdom, Sept. 6 -- John Malkovich has suggested he regrets his affair with Michelle Pfeiffer.

The 71-year-old actor's marriage to the late Glenne Headly ended in 1988 after six years when he began an illicit romance with his Dangerous Liaisons co-star, and he doesn't think his behaviour was "fair" because not only did it ruin his relationship with his wife, he also lost a friend and collaborator as a result.

Speaking on the Fashion Neurosis podcast, he said: "It's not something I've ever really talked about.

"Put it in this way, in the work I do, you make emotional bonds with people very quickly.

"That's part of the work. Very rarely, those bonds extend beyond the work.

"For me, she was someone I valued greatly as a colleague...