Cowles' manager announced his passing on Twitter:
Born in New York City, Cowles' first television role was on NYPD in 1969. He went on to create and play Billy Clyde Tuggle on All My Children, a role he reprised over the years from 1977 through 2013. He also won two Daytime Emmys for the part.
All My Children head writer Jean Passanante tweeted her condolences:
Cowles appeared in numerous films shows including Shutter Island, Nurse Betty and City by the Sea.
In 1983, Cowles wed Baranski, with whom he has two children.
#Matthew Cowles passed away on 5/22.I had the pleasure of being his manager. He was a very gifted and kind man who loved life and everyone.
So sad to hear about the death of Matthew Cowles, #AMC's one and only Billy Clyde Tuggle. A sweet man and a uniquely talented actor.