Ed O'Neill joins ABC's 'Family' pilot

Eric Stonestreet also cast in the single-camera comedy

Ed O'Neill is returning to comedy series.

The "Married With Children" alum has been tapped to star in the ABC half-hour pilot "An American Family," which also has cast Eric Stonestreet.

The single-camera project, from 20th TV, revolves around three families: a traditional one; another that includes a 60-year-old man (O'Neill) who becomes a stepfather after marrying a Latina (Sofia Vergara) who is 30 years his junior; and the third, a gay couple (Stonestreet, Jesse Tyler Ferguson) who have adopted a Vietnamese baby.

After his starring turn on Fox's "Children" O'Neill did a string of dramas, most recently HBO's "John From Cincinnati." He is repped by ICM and Brillstein Entertainment.

Thruline-repped Stonestreet most recently co-starred in ABC's comedy pilot "This Might Hurt" from Jason Winer, who is directing "Family."