Whatever she may be feeling on the inside, Michelle Williams looked like Star the Strong and Glamorous at the Moscow premiere of Oz: The Great and Powerful.

The actress was keeping busy with film-promotion duties in Russia on Wednesday, a day after it was widely reported that she and Jason Segel had split up after about a year of pretty serious-looking dating and less than two months after a trip to Cancun!

After hitting up an Oz photo call with costars Mila Kunis and James Franco, Williams picked out a chevron-striped black and gold gown by Jason Wu for tonight's red-carpet premiere.

Here's what Michelle Williams says about Jason Segel in the latest issue of InStyle

Sources told Us Weekly, which first broke the sad split news, that logistics ultimately took their toll, Williams being based in New York with her daughter and Segel being rooted in L.A.

"I'm really happy to not have anything looming—except my hair," Williams joked.