Ashton Kutcher and Lea Michele got their flirt on last night at the LA premiere of New Year's Eve. She brought along her best friend Jonathan Groff as her date, but later even thanked Ashton on Twitter. Lea wrote to Ashton, "It was such an honor working with you. I cannot thank you enough."
Joining Ashton and a Valentino-clad Lea on the red carpet at Grauman's Chinese Theatre were their other costars, including Zac Efron, Michelle Pfeiffer, and Abigail Breslin. Hilary Swank, meanwhile, posed in a sequined Elie Saab gown. Katherine Heigl threw an arm around husband Josh Kelley, and Josh Duhamel accompanied wife Fergie. Sofia Vergara posed solo and looked amazing in a LBD. The cast moved on to an afterparty held at Hollywood and Highland, where Sofia tweeted that Ludacris joined in on the fun.