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Brad Pitt, Angelina Jolie

Dan Herrick/KPA/ZUMAPress.com

Brad Pitt and Angelina Jolie have not tied the knot.

Speculation about secret nuptials started Tuesday when Taraji P. Henson, who stars as Queenie opposite Pitt in The Curious Case of Benjamin Button, referred to her costar as Jolie's "husband" during an interview at the Palm Springs International Film Festival.

But Henson tells me we shouldn't look too deeply into the husband remark because...

"It was a slip," Henson explained to me earlier today at In Style and the Diamond Information Center's Red Carpet Ready luncheon and fashion show. "I mean, they have a family, they live together. What is married really? It's like they are married."

Henson joked that she was worried about "getting into trouble" with Pitt and Jolie. But she ultimately came up with a great way of making it up to them:

"I told Angelina, 'I will babysit for you anytime,' " Henson said. "All the kids are very adorable. They're good, good kids."

Also at the luncheon, hosted by In Style editorial honchos Ariel Foxman and Charla Lawhon and the DIC's Sally Morrison, were this year's Golden Globes Girl Rumer Willis, Maria Bello, Andrea Bowen, Olivia Wilde, Debra Messing and Ashley Greene.