Star Tracks: Monday, Dec. 5, 2016
Sienna Miller is a vision in a blush pink ensemble at the 2017 Breakthrough Prize at NASA Ames Research Center on Sunday.
Reunited and it feels so good! Michelle Williams and her Dawson's Creek costar James Van Der Beek come together at the Manchester by the Sea holiday party on Saturday.
Office Christmas Party star T.J. Miller goes all-in for the holiday season at the SiriusXM Studios in New York City on Monday.
MAN AT WORK
Rupert Grint is hard at work on the Manchester City, England set of his new movie Snatch.
THIS IS NOT A GAME
Leading man Michael Fassbender poses at a photocall for his new film Assassin's Creed Monday in Paris, France.
Karlie Kloss delivers a smoldering look as she attends The Fashion Awards on Monday in London.
MADE FOR A MODEL
A statuesque Gigi Hadid sports a structured look at The Fashion Awards 2016 in London on Monday.
A LOOK BACK
Donning color-coordinated outfits, Emma Roberts and Evan Peters walk together in L.A.
Real Housewives of New York's Bethenny Frankel shows off her super-toned body as she soaks up the sun in Miami Beach.
ANGEL AMONG US
Victoria's Secret Fashion Angel Adriana Lima stops by AOL Build on Monday in N.Y.C.
ON TOP OF THE WORLD
On day 13 of his trip to the Caribbean, Prince Harry visits the iconic Kaieteur Falls in Surama, Guyana on Saturday.
WHAT A CATCH
Selena Gomez is back in black! The singer heads to L.A.'s Catch restaurant for dinner.
Victoria Justice shows off her style game while walking through N.Y.C.'s Soho neighborhood on Sunday.
This Is Us actress Chrissy Metz poses alongside Dancing with the Stars pro Derek Hough at the Brook Brothers holiday celebration with St. Jude's Research Hospital on Saturday in Beverly Hills.
Mariah Carey and rumored new flame Bryan Tanaka cozy up at Sunday's Mariah's World viewing party in N.Y.C.
ALL IN THE FAMILY
Maria Shriver clocks in some bonding time with her daughters Christina and Katherine at the Manchester by the Sea holiday party on Saturday in L.A.
FOR THE LOVE OF ART
On Saturday, Madonna and son David head to the singer's "Evening of Music, Art, Mischief and Performance to Benefit Raising Malawi" event in Miami Beach on Saturday.
Lindsey Vonn, Molly Shannon and Kate Beckinsale get cozy at a Manchester by the Sea holiday party on Saturday in L.A.
THE GOOD LIFE
Kendall Jenner enjoys a glass of wine Sunday in Miami.
WOMAN IN THE MOON
Lady Gaga takes the stage Sunday at The X Factor Live Finals.
A pouting Karolina Kurkova supports Ian Somerhalder at his Foundation Benefit Gala on Saturday in Chicago, Illinois.
Jay Duplass and Kathryn Hahn pose at the TrevorLIVE Los Angeles fundraiser on Sunday.
TIME TO PARTY
Jennifer Morrison attends the Brook Brothers holiday celebration with St. Jude Children's Research hospital on Saturday in Beverly Hills.
Darren Criss puts his paws up with Cats stars Mamie Parris and Tyler Hanes backstage at the Saturday show in N.Y.C.
Sunday in New York City, Dakota Fanning is accompanied by a mystery man as she makes her way around town.
Bethenny Frankel rocks a coral bikini in Miami on Saturday.
YOU ARE WHAT YOU EAT
Dear Evan Hansen star Ben Platt meets his cake likeness at the musical's opening night party Sunday in N.Y.C.
Ansel Elgort and girlfriend Violetta Komyshan are all smiles at Friday's Knicks vs. Timberwolves game in N.Y.C.
On Saturday, Prince Harry visited Joshua House Children's Centre in Georgetown, Guyana, for a final stop in his royal tour of the Caribbean.
GIRL ON FILM
Jessica Chastain attended the the Cinema Society and Piaget's afterparty for EuropaCorp's Miss Sloane in New York City on Saturday.
PRETTY IN PINK
Naomi Campbell attends the Fashion Awards in partnership with Swarovski nominees' lunch hosted by the British Fashion Council with Grey Goose at Little House Mayfair in London on Saturday.
Matthew McConaughey and Reese Witherspoon attended the premiere of Sing in Los Angeles on Saturday.
Anne Hathaway was spotted filming Ocean's Eight in New York City on Saturday.
DO YOU BELIEB?
Justin Bieber performed at the 102.7 KIIS FM's Jingle Ball 2016 presented by Capital One at Staples Center in Los Angeles on Friday.
Freida Pinto attended the gala dinner as The Business of Fashion Presents VOICES in Oxfordshire, England, on Friday.