They will headline The Glee Club Comedy event at this year's festival, which takes place (as always!) at Hylands Park, Essex and Weston Park, Staffordshire.
Essex-born Russell said: "I can't believe I'm headlining the V Festival Glee Club Comedy Tent! I will celebrate afterwards by heading straight to the Dance Tent, and throwing myself around to techno music like a tribal chief beating a drum."
Other comedians on the bill include Seann Walsh, Shappi Khorsandi, Nick Helm and Gary Delaney.
Seann said: "I am looking forward to V Festival. However, I am not looking forward to the few days after it. I am both excited and terrified. Oh God!"
Shappi added: "Sadly, rock stardom didn't happen for me so performing at V Festival's Glee Club Comedy Tent is the very next best thing."
V Festival is being headlined by Kasabian and Calvin Harris, with the likes of Sam Smith, Ellie Goulding, Stereophonics and Olly Murs all on the lineup.
It takes place 22 and 23 August 2015. For tickets and more information visit www.vfestival.com.