Girls star Allison Williams has taken her romance with John Mayer's best pal Ricky Van Veen to the next level - the couple has moved in together, according to U.S. reports.

The Tv star, who is the daughter of revered U.S. newsman Brian Williams, and the CollegeHumor.com founder have been dating since May, 2011, and now they are setting up home together in New York.

A source tells Life & Style magazine, "She lives with him in the Chelsea neighborhood."

Mayer recently namechecked Van Veen during an interview with RollingStone.com, when asked who he considers his best friends. He revealed he was conducting the phone chat from the website boss' home.