Eclipse Dad: Taylor Lautner Should "Never Wear a Shirt"

Taylor Lautner may be sick of taking off his shirt, but his Eclipse co-star Peter Facinelli thinks he shouldn't shield his six-pack.

"He worked really hard for those!" 36-year-old Facinelli (who plays Robert Pattinson's dad on the vampire saga, but is married to Jennie Garth and father to Luca, 12, Lola, 7, and Fiona, 3, in real life) told UsMagazine.com at the Father's Day/Khaki's Make the Man fundraiser in NYC Thursday.

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"I don't think he should hide them," joked Facinelli, who also spent six weeks training and learning fight choreography for the flick, out June 30. "If I had that six-pack, I would never wear a shirt!"

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Facinelli also opened up about Pattinson and Kristen Stewart, whom, the new issue of Us Weekly reports, have been holed up in a love nest since filming wrapped.

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"I think it's great if they're happy!" he told Us when asked about their relationship. "I feel like when you watch them on screen, their chemistry always works."

For more -- including how Pattinson thinks Stewart's "The One"; her struggles to say "I Love You"; how her mood swings have led to ugly public spats; and why Pattinson's pals fear she'll "move on once all this Twilight stuff is over" -- pick up the new Us Weekly today!