Oh no!

In an exclusive new interview with Closer Weekly, Shirley MacLaine revealed the surprising reason why she has never — and likely never will — work with her brother, Warren Beatty.

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Warren and Shirley in April 1966.

"Oh, I don’t think we’d be a good team," the 82-year-old actress told Closer at the TMA Heller Awards on Thursday, Nov. 10 in Beverly Hills, Calif.

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So how does Warren, 79, feel about making a movie with his older sister? "[That’s] not a bad idea," he recently told CBS Sunday Morning. Too funny!

For the full story on Shirley and Warren, pick up the new issue of Closer Weekly on newsstands now!

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