https://etcanada.com/news/473714/brad-pitt-and-leonardo-dicaprio-remember-their-early-days-on-growing-pains/

“We did start on the same television show,” Pitt said on the Today show. Pitt appeared (https://www.youtube.com/watch?v=RXyeEfZoNTA) on two episodes of Growing Pains, in 1987 and 1989, playing two different characters. DiCaprio joined (https://www.youtube.com/watch?v=lYN-L_qBOsY) Growing Pains full-time for its final year in the 1991-92 season as homeless boy Luke who is taken in by the Seavers.

Over 30 Years Ago, Brad Pitt & Leonardo DiCaprio Both Appeared on This Iconic 1985 Sitcom (& It Deserves a Rewatch) (https://www.cbr.com/growing-pains-sitcom-brad-pitt-leonardo-dicaprio-rewatch/)

Growing Pains featured many cameos over its seven season run, and two of the most notable movie stars had roles on the popular sitcom.