Young Sheldon is keeping it in the CBS family.
Mike and Molly star Billy Gardell has booked a guest-starring role on The Big Bang Theory prequel, EW has learned exclusively.
Gardell will play Herschel Sparks, the chicken-raising neighbor of the Coopers and father of Sheldonâ€™s tormentor, Billy Sparks.
The comedy, which was picked up for a full season two days after its special Monday preview debut, follows a 9-year-old Sheldon Cooper (Big Little Liesâ€™ Iain Armitage) living with his family in East Texas and going to high school. Zoe Perry plays Sheldonâ€™s mother, who is portrayed on the flagship by Perryâ€™s real-life mom Laurie Metcalf. Lance Barber, Raegan Revord, Annie Potts, and Montana Jordan also star.
Young Sheldon returns on Thursday, Nov. 2 at 8:30 p.m. ET on CBS.