Brad Copeland (Arrested Development) has come on board to write ABC’s family comedy toplined by Chevy Chase and Beverly D’Angelo. The network bought the project, which reunites the National Lampoon’s Vacation stars, in January with a big penalty said to be the size of a production commitment. The comedy,  bradcopeland1which hails from Aaron Kaplan‘s Kapital Entertainment, has been laid off at ABC Studios.

Based on an original idea by Kaplan, the untitled single-camera comedy would star Chase and D’Angelo as spouses in their 60s who are finally enjoying their golden years. They have raised their daughter, who is grown and now lives on the other side of the country with her two kids — and that’s the way these selfish grandparents like it; now they only need to see their grandkids a couple of times a year. But, due to circumstances beyond their control, they now are forced to raise their grandchildren.

Copeland, repped by UTA, and Kaplan will executive produce together, reuniting after also collaborating on MTV’s The Inbetweeners, U.S. version of the British series adapted by Copeland and produced by Kapital Entertainment.

Kaplan, a big fan of the Vacation franchise, approached D’Angelo with the idea for the show. She came on board and reached out to Chase, who also signed on. The pitch was taken to ABC, which jumped on it immediately, starting a lengthy deal-making process, which closed in January.