'Vicious' Creator Talks Season 2 of Ian McKellen, Derek Jacobi Sitcom

Ian McKellen, left, and Derek Jacobi in 'Vicious'

Gary Janetti, who also wrote 'Will & Grace,' promises more guest stars on what is now a co-production between ITV and PBS

The second season of Vicious, the sitcom starring British acting royalty Ian McKellen and Derek Jacobi, is due to start production later this month, according to its creator and showrunner Gary Janetti. And it will feature more guest stars, among other things, he said.

Speaking to The Hollywood Reporter, Janetti said that external photography would begin "in two weeks," before the production moves to London Studios in front of a live audience on Dec. 21.

"We'll be shooting each Sunday there for the next couple of months, with a break for Christmas," he added.

Read more 'Vicious' Co-Creator on Ian McKellen's New Sitcom and Why Age Trumps Gay

The show, which sees McKellen and Jacobi play a gay couple living in a London flat, aired on ITV last year. Its first six-episode season screened in the U.S. on PBS over the summer. PBS has now come aboard as a co-producer for season two.

The second season will have "more locations, more guest stars," Janetti said without revealing any names. And he revealed that he was hoping for a third season. "I always saw it as three seasons," he explained.

Janetti also discussed the relationship between the show's co-stars. "They're old friends and were very supportive of each other on set," he said, adding that the two first met in college, where they acted together, but hadn't performed with each other since.