Reclusive Warren Beatty has become a hermit, locking himself away in his lavish mansion in the Hollywood Hills, and it's got pals more worried than ever about his sad decline, RadarOnline.com can reveal.

The once legendary lothario, 88, lives a solitary existence while his wife, Annette Bening , who's two decades younger at 67, is constantly on the go, pursuing a busy career and active social life, the insider said. Article continues below advertisement

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The couple, who met on the set of Bugsy in 1991 and have four kids together, are now like "ships in the night."

"Warren has slowed down and Annette hasn't, and

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