The 34-year-old actress and 'Suit & Tie' hitmaker celebrated their little boy's first birthday last week, reported People magazine.
"They're like the same person. 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," Biel said.
"They just sit there on the couch staring at it. And they don't communicate anymore. When golf is on, all the communication ends.