Star Tracks: Mila Kunis Goes Blonde on Set, Plus Laura Dern, Susan Sarandon, Robert Pattinson & More

Susan Sarandon (center) and her sons Miles and Jack Henry Robbins attended the Hollywood Foreign Press Association Cocktail Party at the Venice Film Festival on Saturday.

Kristen Bell and Kelsey Grammer film their new project Like Father in New York City.

Laura Dern strikes a pose at the Deauville American Film Festival in Deauville, France, on Saturday.

Robert Pattinson arrives at the Deauville American Film Festival in Deauville, France, on Saturday.

Sam Heughan, Mila Kunis and Kate McKinnon film The Spy Who Dumped Me this week.

Justin Timberlake looks ready for fall in a fuzzy red sweater while out in N.Y.C. on Thursday.

Julianne Moore looks every inch a movie star in a flowing red dress at the Venice Film Festival in Italy on Friday.

George Clooney arrives at the Venice Film Festival by boat, where he's set to premiere his new directorial feature, Suburbicon.

Big Little Lies star Alexander Skarsgard is on the move in N.Y.C.'s East Village neighborhood on Friday.

Meanwhile, Sarah Silverman runs to catch a cab in N.Y.C. on Friday.

Gwen Stefani keeps it casual in jeans and a T-shirt while running errands in Westwood, California, on Thursday.

Christie Brinkley brings daughter Alexa Ray Joel to a special screening of The Weinstein Company's Tulip Fever, hosted by Donna Karan to benefit The Sag Harbor Cinema, at Karan's home in East Hampton, New York, on Thursday.

Seth Rogen rocks a smile while stepping out for the premiere of Dumpster Diving on Thursday in L.A.

Robert Redford and Jane Fonda have some fun on the carpet at the Venice Film Festival in Italy on Friday, during a photo call for their film, Our Souls at Night.

Jason Derulo points to his noggin while performing on Good Morning America on Friday in N.Y.C. moments after going live on Instagram at Equinox Columbus Circle.

Colin Firth supports wife Livia as she hosts a lunch to announce Chopard as a partner for her Green Carpet Fashion Awards in Venice on Friday.

Vanessa Hudgens rocks chic neutrals while out and about in Los Angeles on Thursday.

Kate Hudson shows off her super-short cut while filming Sister, in which she costars alongside Maddie Ziegler, in West Hollywood on Thursday.

Jason Momoa gets a surf break on the set of Aquaman in Byron Bay, Australia, on Friday.

Goldie Hawn waves hello as she heads out for the day in Los Angeles on Thursday.

Jonah Hill takes a break between takes for his new film, Maniac, in N.Y.C. on Thursday.

Costar Emma Stone is also spotted on the New York City set on Thursday.

Kristen Stewart has a night out with girlfriend Stella Maxwell (not pictured) in N.Y.C.

Chrissy Teigen soaks in the last few days of summer on a yacht while on vacation in Sardinia, Italy, on Thursday.

Also shooting in New York City on Thursday — on a different project — is Jennifer Lopez, who bares her abs on the set of her latest music video.

Sofia Richie goes barefoot during a day of shopping in Malibu, California, on Thursday.

After a night out with former Bachelor in Paradise co-star Corinne Olympios, DeMario Jackson hits the gym on Thursday in L.A.

Emma Roberts is on the go with a book in hand on Thursday in L.A.

Ethan Hawke and his son, Levon Thurman-Hawke, 15, take their seats for the First Reformed premiere on Thursday at the Venice Film Festival.

Darby Stanchfield departs Good Morning America in New York City.

Gwen Stefani is spotted in Sherman Oaks, California saying goodbye to son Kingston (not pictured) as he boards his school bus on Thursday.

Kate Bosworth catches a boat ride to the Venice Film Festival.

Nev Schulman and wife Laura attend BUILD to discuss their new show, We Need to Talk, on Thursday in N.Y.C.

Rebecca Hall signs autographs on the red carpet ahead of the First Reformed screening on Thursday during the Venice Film Festival.

Sarah Silverman is spotted holding a sign while filming in New York City on Wednesday.

On Wednesday in Studio City, Kaley Cuoco helps Panera Bread debut their Craft Beverage Station.

Elle Fanning wears a jumpsuit featuring illustrations of women while out in New York City on Wednesday.

Eva Longoria keeps it comfy in a wine tee and sweatpants on Wednesday in Los Angeles.

Jon Hamm steps out in Los Angeles on Wednesday.

Cindy Crawford indulges in retail therapy on Wednesday in Malibu.

Victoria Justice poses for a Studio City photo shoot.

Kristen Wiig is radiant at the Wednesday premiere of Downsizing during the Venice Film Festival.

Matthew Rhys and girlfriend Keri Russell stay intertwined while taking a stroll.

On Wednesday, star Melissa Benoist holds a pup on the Vancouver set of Supergirl.

Kristen Stewart addresses the audience during the MoMA screening of Refinery29's Come Swim, which was directed by the actress, on Wednesday.

Pierce Brosnan and wife Keely Shaye Smith are spotted in L.A. on Wednesday.

Equipped with his guitar, Ed Sheeran delivers a rockin' performance at the American Airlines Arena on Wednesday in Miami.

Joining Ed Sheeran at the American Airlines Arena, James Blunt takes the stage to give his own performance.

During a break from paddle boarding in Sardinia, Italy, Chrissy Teigen and husband John Legend take a moment to freshen up on Wednesday.

Bryan Cranston reads an excerpt from his memoir, A Life in Parts, on Wednesday.

Ethan Hawke and Amanda Seyfried hit the Venice Film Festival to promote their new movie, First Reformed, on Thursday.

Alyssa Milano and her son, Milo, share a special moment with Mickey Mouse at Disney World on Tuesday.

Dwight Yoakam performs for SiriusXM in the Hamptons on Wednesday.

Niall Horan stops to take pictures with some adoring fans while arriving at RTE Radio in Dublin to be interviewed for the Eoghan McDermott Show on Wednesday.

Maria Menounos visits SiriusXM Studios in N.Y.C. on Wednesday.

Nicole Scherzinger strikes a pose as she arrives at the X Factor TV show press launch on Wednesday in London.