The actress was seen dressed up as cowgirl Jessie with Timberlake as Buzz Lightyear and Silas as Woody.
"Clearly Lil Woody is the boss of this Halloween rodeo! Love, Buzz, Jessie and Woody #HappyHalloween," Biel captioned the photo.
Dion for Halloween dressed up as Disney villain Maleficent and updated her Instagram with a photo of herself posing with her twin sons, 7-year-olds Eddy and Nelson who also dressed up for the holiday.
"Happy Halloween! / Joyeuse Halloween! - Team Celine," Dion added.
"Happy Halloween from the crazy people #piratelife," the singer wrote.
Blac Chyna posed alongside her two children, 5-year-old King whom she shares with rapper Tyga and baby daughter Dream whom she shares with Rob Kardashian. The trio wore matching skeleton costumes with Chyna and King sporting masks.
"#happyhalloween from our vampire family to yours," Alba stated.
Jessica Simpson and her husband Eric Johnson for Halloween paid tribute to country icons Willie Nelson and his longtime collaborator Waylon Jennings while their 5-year-old daughter Maxwell dressed up as Belle from Beauty and the Beast with their 4-year-old son Ace dressed as a cowboy.
"Willie, Waylon, Belle and Cowboy Ace #Halloween2017" Simpson wrote as she was seen wearing a beard and bandanna to appear as Nelson.
WWE and Total Bellas star Brie Bella also celebrated Halloween with her infant daughter Birdie and shared on Twitter their costumes.
"Hope everyone had a great Halloween!! #babysfirsthalloween," Bella wrote alongside a photo of herself wearing spooky makeup and a feathered top hat while Birdie wore a pumpkin outfit.