Kiley Bishop / Retna Ltd. 1 / 5
Kiley Bishop / Retna Ltd. 1 / 5

Former "ER" star Noah Wyle has separated from his wife of almost 10 years.

RELATED: Which celeb couples split in 2009?

A rep for Noah and wife Tracy tells ET, "Tracy Wyle and Noah Wyle, who separated in late October 2009 have confirmed they have entered into a mediation process," explaining, "Tracy and Noah live in separate residences, however their two children (Owen, 7 and Auden, 4) see both parents daily."

RELATED: Check out our field guide to your late night guys

More on ETonline.com:

George Clooney Returns to 'ER' Tonight

'ER' Says Final Goodbye