Mary McCormack kicks husband out for cheating with Katharine McPhee

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Actress Mary McCormack threw straying husband Michael Morris out of their Los Angeles home Sunday night after he revealed to her that photos of him smooching younger “Smash” star Katharine McPhee were about to break online, sources exclusively tell Page Six.

Morris, who directed McPhee on NBC’s failed musical series, knew the photos were about to hit because, a source adds, he tried to buy them himself to keep them from ever being seen by the public — and thus ruining his marriage and reputation.

“Mary threw Michael out of the house on Sunday night when he told her that TMZ had the photos and that they were about to be released,” said an insider.

Meantime, McPhee, 29, and her husband, Nick Cokas, 47, have been married since 2008, but reportedly have been amicably separated for months.

A source close to former “American Idol” star McPhee said that after “Smash” was canceled, she headed from New York, where it was filmed, to LA so she could work on her fourth album, which is expected to be released next year. She apparently reunited with Morris there.

Reps for McCormack, Morris and McPhee, and Cokas did not return requests for comment.