United Kingdom, July 22 -- Bill Cosby has paid tribute to his The Cosby Show co-star Malcolm-Jamal Warner.

The actor tragically passed away on Sunday (20.07.25) at the age of 54 after drowning while on holiday in Costa Rica and has been remembered by Cosby as a "great studier" after playing his on-screen son Theodore Huxtable in the TV sitcom that aired from 1984 until 1992.

The 88-year-old star told ABC News: "He was always a great studier, and I enjoyed working with him very much.

"He was very professional. He always knew his part... He always knew his lines, and he always knew where to go."

Cosby - who has faced sexual misconduct allegations from a number of women in recent years and had a sexual assault conviction quashed in 2021 ...