Star Tracks: Friday, September 19, 2014

Showing off her new pixie haircut, The Big Bang Theory's Kaley Cuoco heads to the L.A. studio of Jimmy Kimmel Live! on Thursday.

Rocker Lenny Kravitz puts up a peace sign for his fans while in New York City on Thursday.

Over at the Tonight Show, Rose Byrne chats up Jimmy Fallon on Thursday about her new comedy This Is Where I Leave You, and about making her upcoming Broadway debut in You Can't Take It with You.

Giving back never looked so good! Halle Berry and Djimon Hounsou buddy up at CAA's "Lunch with a Leader" School Day benefiting Communities In Schools of Los Angeles, at Bouchon in Beverly Hills on Thursday.

Blue is the color of the night as Tia Mowry and Garcelle Beauvais team up at the PEOPLE StyleWatch Denim Party Thursday in Los Angeles.

Also looking on-trend at PEOPLE StyleWatch's Denim Party in L.A. on Thursday: Jesse Metcalfe, who poses with his actress girlfriend Cara Santana.

This is how you do formalwear! Expectant Zoë Saldana and hubby Marco Perego strike a handsome pose on the Hispanic Heritage Awards red carpet Thursday at the Warner Theatre in Washington, D.C.

Dressed as Shrek's Princess Fiona, Sofia Vergara looks like she belongs in a land far, far away as she films Halloween scenes for an upcoming episode of Modern Family in L.A. on Thursday.

Gugu Mbatha-Raw knows how to work the red carpet at the Beyond the Lights opening during the Urbanworld Film Festival at the SVA Theater on Thursday in New York City.

At the premiere for her new television series, Madam Secretary, in Washington, D.C., on Thursday, actress Téa Leoni gives Morgan Freeman, an executive producer of the show, a warm hello.

That's a capital idea, Chrissy! Teigen, the new face of the XOXO fashion brand, has a lot of love on hand at the XOXO amp Chrissy Teigen Fall '14 launch party hosted by PEOPLE StyleWatch at the Brickwood in New York City on Thursday.

Something's cooking for Selenis Leyva (right) who shares some Moët amp Chandon bubbly with her Orange Is the New Black costar Dascha Polanco at Thursday's Vanidades Icons of Style event at the Mandarin Oriental Hotel in N.Y.C.

America's Got Talent host Nick Cannon looks like one dapper dad at the Get Lucky for Lupus poker event on Thursday in Beverly Hills.

Model Rosie Huntington-Whiteley pouts for the camera at a photo call for Coca-Cola Life in London on Friday.

You've got questions? He's got answers! Tim McGraw takes over the mic during a Q&A session at SiriusXM Studios on Thursday in New York City to promote his new album Sundown Heaven Town.

Jenny's back on the block! Jennifer Lopez returns to where it all began – her childhood home in the Bronx – during some downtime in New York City on Thursday.

Arm in arm, Kate Hudson and Zach Braff land in London to attend a Thursday night screening of their flick, Wish I Was Here, at Empire Leicester Square cinemas.

The Disappearance of Eleanor Rigby's Jessica Chastain sports a flawless combination – a big smile, sunnies and a blue dress – as she hits the N.Y.C. streets before appearing on The View on Thursday.

Iggy Azalea and Rita Ora buddy up at KISS FM's studios in London on Thursday.

Busy mom Jenna Dewan-Tatum takes some solo time to run errands on Thursday in West Hollywood.