Actor Treat Williams has placed his longtime, four-bedroom co-op apartment on Manhattan’s Upper West Side on the market for $4.75 million.

Williams, 55, recently starred in the WB drama “Everwood” and more recently, is in the new ABC drama “Brothers & Sisters.” The New York Post reported today that Williams, a star of Broadway, movies and TV, has lived in the co-op apartment at 215 W. 78th Street for the last 30 years. He’s selling it now because he’s moving his family to Park City, Utah, and also is looking for a house in Los Angeles, which is where “Brothers & Sisters” is filmed.

Williams’ approximately 2,700-square-foot unit, which is known as PH10-A, is being marketed as a “celebrity penthouse.” Designed by Kevin Walz, who won the American Academy’s Prix de Rome Fellowship, the unit has an entry from a private penthouse landing and has 360-degree views. Features include another 2,700 square feet worth of terrace space, three baths, a new customized HVAC and heating system, and a living room with a wood-burning fireplace. Other features include a chef’s eat-in kitchen with a double-wide farm sink, slate and marble counters, a custom-built table, a Viking range and dishwasher, a Thermador double oven, a SubZero refrigerator and a wet bar, all opening to mullion paned glass doors on the unit’s north terrace. Check out the listing sheet for Williams’ apartment here. And take a look at the Post’s fine coverage of the listing here.

While public records don’t show that Williams has closed on a purchase in California or Utah yet, we’ll keep you posted on those sales if and when they become available—as well as on the price that Williams’ Upper West Side co-op unit closes for as well. Stay tuned.