Del Boy and Rodney, played by Sir David Jason and Nicholas Lyndhurst, sit in a Peckham cafe with the International footballer, who demonstrates that he’s happy to poke fun at himself and be the butt of jokes.
Becks has previously admitted that he was so nervous about starring in the skit that he couldn't sleep, telling The Radio Times: “The day of filming started off with a slightly sleepless night, going over my script.”
“The thought of being on set with Nicholas and David was obviously very nerve-racking," he added.
Jim Sullivan, son of the show's original creator, the late John Sullivan, praised the former footballer’s performance, saying: "His acting and delivery were very good. It was lovely to meet him."
Celebs have been out in force raising money for Sport Relief in recent weeks.
Davina McCall completed a gruelling endurance challenge while Breakfast Show presenter Nick Grimshaw took part in a cycling event as part of BBC Radio’s Radio Around The World efforts.
Little Mix have also been getting involved by recording the official Sport Relief charity single, a cover of Cameo’s ‘80s hit ‘Word Up!’
Viewers can see the full ‘Only Fools And Horses’ clip during BBC One’s Sport Relief telethon on Friday 21 March, from 7pm.