He said: "If there's something that the three of us can agree on then I'd love to do it. George is working on something but I haven't seen anything on paper.
"We've talked a little bit about it. It would be fun, I'd love to do it."
It was recently reported Harrison is trying to lure Sean Connery out of retirement and get him to reprise his role as his father in 'Indiana Jones 5', a part he played in 1989's 'Indiana Jones and the Last Crusade'.
A source said: "Everyone is keen to get Sean back as Professor Henry Jones Senior. They wanted him back for the last movie.
"Everyone's hopeful he'll agree to reprise the role even in a small way. I hear Harrison Ford has been sending gifts to try to convince him. I think he could go for it. It would be on his terms."