Michael Lannan created the half-hour series, which stars Groff (Spring Awakening, "Glee," "The Normal Heart"), Frankie J. Alvarez and Murray Bartlett as three young gay men living in San Francisco.
Tovey will play a "video game wunderkid," with Scott Bakula also set to play a prominent wealthy figure in San Francisco's gay community.
Groff spoke about the series in a recent interview with Playbill.com. "Looking," he said, "takes place in modern day [and concerns] a bunch of gay guys … It's sort of a slice-of-life kind of TV show that hopefully will be breaking some ground potentially in that there hasn't been a show like this on TV in a long while, about gay men just living their lives in today's world. I think the goal of the show and the purpose of this show is to illustrate the complexities and realities of the modern-day gay experience, which is a lot of things."
Produced by Andrew Haigh, Sarah Condon and David Marshall Grant, the series will begin shooting this fall in San Francisco towards a 2014 debut on HBO. Haigh directs the series.