Although Jessica Biel is known as one of the most fashionable celebrities around, Justin Timberlake's wife ditched the makeup and the gowns on Friday for a more casual getup while running on errands in Sherman Oaks, Los Angeles.

"Keeping her outfit casual the beauty, who gave birth to her son Silas in April, donned a pair of grey tracksuit bottoms, a black T-shirt and a dark denim jacket over the top," Daily Mail said.

"She wore sensible white plimsoll trainers for the occasion and finished off her outfit with a pair of metallic-tinted sunglasses," it added.

Just five days ago, Jessica Biel was dressed to the nines when she joined husband Justin Timberlake to show their support for the Baby2Baby red carpet gala.

For the event, Jessica Biel wore an off-shoulder Monse dress which she paired with a Fendi bag and Lorraine Schwartz jewels.

"The new mom wore a Monse custom gown inspired by the designers debut Spring 2016 collection," said Red Carpet blog. "Yes, this is so very pretty, but I wish Monse had saved this for someone with more presence to successfully pull off such a sculptural piece."

"I should be wowed, but in the hands of Jessica, I'm totally underwhelmed. This could be due to how bulky it makes her look and that Fendi clutch," it said.

When she's not being glamorous, Jessica Biel prefers to stay at home with husband Justin Timberlake and playing with baby Silas.

Previously, OK! magazine claimed that Jessica Biel and Justin Timberlake are already planning for baby no. 2.

"They want to have three kids total," the reported source claimed. "So they're talking about having a second child soon."

To date, Jessica Biel and husband Justin Timberlake have yet to respond to the rumors about baby no. 2, although that wouldn't be a stretch considering how the two are enamored with Silas Randall.