Jessica Biel is opening up for the first time about becoming a first-time mom earlier this year, welcoming son Silas with husband Justin Timberlake in April.

The couple shared the first photo of baby Silas the same month he was born, in which he was wearing a Memphis Grizzlies jersey.

Biel revealed to E! News what the “most magical” part of motherhood is so far.

"Probably the moment he wakes up from a nap," she said. "He's sort of looking around and you sort of creep up and look over the crib and he looks up and he goes [Biel lets out a big sighing sound]. Just a gummy mouth, no teeth, just a big smile, happy that you're alive and you're just looking at him.”

She went on to laugh, "but you quickly move on from it because there is a dirty diaper in your palm."

Biel went to talk about Timberlake joining Taylor Swift for the last night of her Staples Center run, after which she hung out backstage.

"It was super fun," she said. "We are fans of music from all walks of the spectrum, from country to rock to R&B, to hip hop, whatever. I'll pretty much see anyone live."

image via INFphoto.com