Jerry Seinfeld

Marriage Ref, Minute to Win It and Who Do You Think You Are? have all been renewed for second seasons, NBC announced Monday.

Watch full episodes of Marriage Ref in our Online Video Guide

"All of these new series have demonstrated increasing popularity and generated far-reaching interest among viewers," said Paul Telegdy, executive vice president of alternative programming. "Equally important, each has a compelling and innovative format, and a second season will allow these shows to grow creatively and attract an even wider audience."

Marriage, from executive producer Jerry Seinfeld, has been averaging 7.2 million viewers since its debut after the Winter Olympics' closing ceremonies. The show also retains 93 percent of its 30 Rock lead-in audience.

Guy Fieri on why he was born to host Minute to Win It

Minute, the outlandish game show hosted by Guy Fieri, has been averaging 6 million viewers weekly, growing 25 percent overall in its second half hour.  Who Do You Think You Are?, the series that traces the genealogy of celebs like Sarah Jessica Parker and Susan Sarandon, has been averaging 6.8 million viewers.