It seemed like old times at last night's Metropolitan Museum of Art Costume Institute gala, where on-again, off-again couple Jude Law and Sienna Miller went public with their relationship for the first time since rumors sprouted that they were back together.

Miller, 28, wore a blue Emilio Pucci dress. (For more on last night's fashions, visit Stylelist.)

The couple reportedly reunited at the end of last year while starring in separate plays on Broadway, according to British tabloids. The reunion ended a long hiatus for the couple, whose relationship fell apart in 2005 after Law admitted to having an affair with his nanny.