Anna Faris Credits ‘Huge’ Son Jack for Her Toned Arms

09/22/2013 at 08:00 PM ET

Anna Faris Emmys
Frank Miclotta/Invision for Academy of Television

What’s the secret to Anna Faris‘s super-buff arms?

Baby lifts!

“My arms have never been toned before and now they are because he’s HUGE,” the Mom star, 36, told PEOPLE Sunday on the Emmys red carpet, referring to son Jack, 13 months.

“He’s got a huge head, a huge body. He’s like 60 pounds,” she said in jest, but seriously added that the tot, who was born premature, is “so active.”

Jack might be gaining weight, but his father, actor Chris Pratt is shedding it — and not exactly to Faris’s liking.

Pratt slimmed down for his starring role in Marvel’s Guardians of the Galaxy, and in July Tweeted a photo of himself and his impressive washboard abs. Yet despite his yummy appearance, Faris, his wife of four years, is clearly less than impressed.

“It’s SO annoying,” she declares. “I can’t wait for him to come back from shooting. I do [miss his old size] a little bit.”

But she seems confident that her hubby’s six-pack won’t last forever.

“We both love to eat and drink, so I’m sure [the weight won’t stay off]. You have to live life sometimes, you know?”

— Kathy Ehrich Dowd, with reporting by Dahvi Shira and Jennifer Garcia

FILED UNDER: Anna Faris , News , Parenting , Video

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LC on

They seem like such a cute family!

Callie on

She looked awful! She is normally so cute but her stylist really screwed with her last night. The hair would have looked better in a ponytail and the lipstick was extremely loud

Pixy on

My son was 7 weeks early and us huge now! My arms have never looked better:)

Zombie on

I’m sorry but she looks horrible.

Laine on

She and Chris are the cutest and sweetest couple. She looks beautiful!

Kelly on

Her bangs are WAY too thick. She also looks like she let her stylist take her hair much more yellow than it usually is. Her eyebrows and lips are too dark.

Teknosbeka on

Not to be rude, but her arms look thin more than toned. Also the bangs and hair color are both horrible, especially with that yellow dress.

Carmel on

She looked dreadful last night! Completely devoid of colour except for a garish slash of red lipstick, and a weird helmet hair of bangs that was….inexplicable LOL I’d fire my stylist, Anna!

Charli on

That’s not a good picture of her. Saw her on the Talk this morning and she looked great.

dsfg on

She looks like she’s wearing a wig.