Shia LaBeouf, who?

Five months after Carey Mulligan split with her Wall Street: Money Never Sleeps costar, the British Oscar nominee appears to have found herself a new man.

The 25-year-old actress and British actor Eddie Redmayne were seen taking a romantic stroll through NYC's Midtown on Saturday. Dressed in a plaid shirt, skinny jeans and brown brogue shoes, Mulligan clung to the 29-year-old's arm as they braved the city's winter weather.

(The pair met back in 2009 when they presented an award together at the BAFTAs.)

"They look really happy together," a source tells the New York Post's Page Six.

Though Redmayne isn't as high-profile as Mulligan's last boyfriend, he boasts an equally impressive acting resume. He won a Tony Award in 2010 for his performance in Red, and he'll share the screen with Michelle Williams in the upcoming film My Week With Marilyn.

LaBeouf, 24, probably won't be too upset to learn his former flame has moved on: in late December, the actor was spotted holding hands and sharing coffee with a mystery brunette in L.A.