The Walking Dead's Steven Yeun will guest star on American Dad

The Walking Dead star Steven Yeun, who plays Glenn on the AMC smash hit, will lend his vocal talents to an upcoming episode of Seth MacFarlane's animated comedy American Dad on Fox.

EW.com reports exclusively that Yeun has recorded a guest-starring spot on the show Charles, the assistant of Vincent, whose parents were killed in the most recent episode of American Dad's story arc called "The Golden Turd." The episode will air later this season. Other guest stars on American Dad this season include Zooey Deschanel, Olivia Wilde, Alison Brie, Stanley Tucci and Kim Kardashian.

Yeun is no stranger to animation, as he also voices Avatar Wan on Nickelodeon's The Legend of Korra. He has played Glenn since the first episode of The Walking Dead.

For those of you who want some Walking Dead spoilers, the "Mega Buzz" column at TV Guide reported the following shortly after the Season 4 midseason finale:

"Thanks for the scoop on The Walking Dead. More, please! - Paula
I pumped Robert Kirkman for some scoop on the second half of the season and he offered up three interesting tidbits: 1) Carol will definitely return before the end of the season; 2) The Sanctuary, which was discussed in that radio message, will come into play; and 3) Via flashbacks, there will be glimpses into the lives of our favorite characters, likely including Michonne to get an answer about this."

The "this" in question refers to the possibility that Michonne had a child or multiple children at some point, possibly before the zombie outbreak.