The 90-year-old shared the news Saturday on BBC Radio 4's 'Best of Today' show.
The actor was all smiles as he posed for photos on the red carpet at a screening of 'The Great Escaper' in London.
The two megastars celebrated a milestone occasion.
'The Muppet Christmas Carol' turns 30! Michael Caine, Kermit the Frog, Gonzo and more chatted with ET on the set in 1992.