Take Hollywood's most Oscar-nominated actress (Meryl Streep), combine with one up-and-comer (Amy Adams), add a heaping helping of gourmet cuisine and—voilà!—a recipe for a summer movie treat. In Julie & Julia
Streep, 60, plays the legendary Julia Child as a newcomer to '50s Paris, while Adams, 35, is blogger Julie Powell, who tries to conquer Child's Mastering the Art of French Cooking
. In real life the pair let loose—"This dress is 35 years old!" Streep confessed upon seeing Adams's designer duds—and shared some tasty surprises with PEOPLE's Natasha Stonynoff. Bon appétit!
So, I made Julia's Roquefort quiche yesterday from Mastering the Art of French Cooking
STREEP: Did you use a bought pastry? Tell us the truth!
Honest, from scratch. But I used my own pastry recipe instead of Julia's.
STREEP AND ADAMS: [In unison] What? Ooooooh! Noooooo!
Did either of you put on weight from all the eating you do in this film?
STREEP: I gained 15 lbs. We ate tarte tatin and chocolate cake and roast chicken and goose ...
ADAMS: ... soup, lobster thermidor ...
What did making this movie teach you about being a great chef?
STREEP: That boning a duck is not that easy, never mind what Julia Child says. It's complicated and it slips out of your hands.
ADAMS: That I can't get the knack of holding the knife right. Everyone kept saying, "Amy, your fingers! Watch your fingers!"
At least today's women don't have to cook in 3-inch heels, like Julia wore.
ADAMS: I cook in heels! I pretty much jog in heels. [To Meryl]
Have you ever seen me in a pair of flat shoes?
STREEP: This is true.
ADAMS: I'm either barefoot or in high heels. I don't have a lot of in-between.
Amy, you got engaged [to actor Darren Le Gallo, 35] during the shoot. Did he hide the ring in a Julia-inspired dessert?
ADAMS: I don't really eat dessert. He knows better than to put it in nachos, 'cause I would have eaten the ring for sure.
So how did he propose?
ADAMS: He got down on his knees. He was begging! [Both laugh]
Julia Child and her husband had a passionate romance. Most people don't really think of her in that way.
STREEP: Julia and Paul had a lifelong love affair. Love comes in all shapes and sizes, and people who share it are very lucky. They have a little halo around them.
This is your second film together. But you don't share one scene!
STREEP: We saw each other once in the hallway. We were ships passing in the night.
You both love to sing. Did you sing a few tunes together shooting Doubt
ADAMS: Well, it wasn't a burst-out-in-song kind of movie. As much as I was tempted to at times.
STREEP: For our third in a series of films together, we're gonna do a musical!
Meryl, you just celebrated your 60th birthday ...
ADAMS: Happy birthday!
Did you do anything special?
STREEP: My girls made me dinner at home and this amazing cake.
From Julia's book?
STREEP: Hmm ... I think it was a Martha Stewart cake.
ADAMS: Oh, noooooo!