EXCLUSIVE: Co-Stars Zoe Saldana and Sienna Miller Share Their Starstruck Golden Globes' Moments

The ladies star in Ben Affleck's new film 'Live By Night.'

Even celebrities can get starstruck! Both Zoe Saldana and Sienna Miller experienced that first hand on Sunday night at the Golden Globes.

“I found myself backstage in a kind of semi-huddle with Brad Pitt, Ben Affleck, and Jon Hamm, which was quite surreal. It was exciting,” Miller gushed to ET’s Carly Steel at the Los Angeles premiere of her new film, Live By Night, on Monday.

WATCH: EXCLUSIVE: Ben Affleck Says Brother Casey's Golden Globes Win Was the 'Most Memorable Experience in My Life'

And though no one happened to snap a photo of the A-list squad together, Miller quipped, “But I have a mental photo that I will hold onto!”

Her co-star Saldana had a similar exciting star encounter.

“[My favorite Golden Globes moment] was sharing the same table with Stevie Wonder and his friend, and also Sting and his wife,” she dished to ET. “We were all kind of starstruck. It was like, us looking at them going, ‘This is beautiful.’ It was really nice.”

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Saldana even found herself at a loss for words, adding, “I just tried laughing at everything that they said. I was so starstruck. It was one of those things.”

And though the actresses are still in awe of their Hollywood surroundings, Miller and Saldana’s young kids don’t seem to be particularly impressed by their famous moms.

“They saw this dress and they weren't impressed because they were watching Peppa Pig,” Saldana said of her twins’ reactions to her premiere look.

Miller said her 4-year-old daughter, Marlowe, preferred her ruffled blue and gold premiere look on Monday to her white cutout dress from the Golden Globes.

“Marlowe likes this one better because there is a little more going on. It’s sparkly and ruffly,” she said.

MORE: Christina Milian Exposes Bare Chest, Spanx in Sheer Dress at ‘Live By Night’ Premiere

But Miller had no plans for a wild evening after two straight days of events.

“I cannot wait to get into my bed after the Golden Globes, it’s a lot! I got my little daughter waiting for me snuggled in my bed, so that’s how I will be living by night tonight,” she quipped.

For more from Ben Affleck on Live By Night, watch ET’s exclusive interview below!