Jessica Biel Says Son Silas Is a ‘Mini Version’ of Justin Timberlake: ‘They Watch Golf Together’

04/16/2016 at 10:10 AM ET

Justin Timberlake and Jessica Biel‘s son Silas turned 1 last week, but besides Mom and Dad, the birthday was no starry blowout — no petting zoo, no bouncy castle, says Biel.

“It was just a small family hang at the house,” Biel told PEOPLE at the Tiffany & Co. 2016 Blue Book dinner at The Cunard building in New York City on Friday. A-listers Reese Witherspoon (wearing a $10 million diamond necklace), Diane Kruger and Naomi Watts were also in the house for the starry (and sparkly) event.

Jessica Biel Tiffany's Event

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Biel noted that she baked little Silas’ birthday cake herself. “It was a lemon pound cake, almost,” she said. “But it had zucchini in there.”

And what is the cutest thing that Silas and Justin do together?

“They’re like the same person,” says Biel, who was wearing a white dress by The Row and a $1.5 million Tiffany diamond bib necklace with over 2,500 individually set diamonds and a $300,000 Tiffany Blue Book diamond bracelet.

“It’s like a mini version of him … They like to sit and watch golf together. The only TV that Silas is allowed to watch is the Golf Channel, which is really funny.”

She adds, “They just sit there on the couch staring at it. And they don’t communicate anymore. When golf is on, all the communication ends.”

— Jeffrey Slonim

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Showing 9 comments

Robin on

Glad to someone who realizes kids don’t need a big Nash for their first birthday.

meg on

Only golf? Poor kid. JT already brainwashing that kid to like golf and be is mini me.

em on

She is so gorgeous

Dan on

I’m sure golf helps put Silas to sleep like it does for everyone else

rubyovertherainbow* on

What a horrible dress.

Vanessa on

That dress is not flattering to her.

Aja on

Jessica is very down to earth. Hopefully her & Justin continue to work out (it is Hollywood)

Marc on

A little Wigger, just like dad, I bet! Also, WTF happened to her??? She used to be pretty! Justin has used that %itch up!!!

Zol on

Very happy for her! Congrats.