Dennis will join the company Aug. 3 to play King Arthur through Nov. 2. After winning ITV's "New Faces" in 1974, he has appeared on a variety of TV shows including "Russ Abbot’s Madhouse," "The Laughter Show," "Family Fortunes," "Celebrity Big Brother" and "Extras." TV acting roles have included appearances in "The Bill," "Brookside," "Merseybeat," "Holby City," "Casualty," and this Christmas he will be guest starring in ITV's "Midsomer Murders." Stage credits in the West End and on tour include Chicago, Me and My Girl, Art, Hairspray and Legally Blonde The Musical.

In a press statement, Dennis said, "As a kid I was always a massive fan of Monty Python so when Spamalot came to town I thought I'd really love to be in that. And now I'm excited that I'm actually not just in it, but playing the lead role. I'm really looking forward to always looking on the bright side of life!"

Davis will join the company Sept. 23 to play Patsy through Oct. 19. He started his career playing the role of Wicket the Ewok in "Star Wars VI: Return of The Jedi" and went on to star in the fantasy feature film "Willow." He then appeared in "The Chronicles of Narnia," "Labyrinth" and the Leprechaun films, before returning to "Star Wars" in "Star Wars Episode I: The Phantom Menace." He has also appeared in the "Harry Potter" films, "The Chronicles of Narnia: Prince Caspian" and in "Jack the Giant Slayer." TV credits include the BBC shows "Extras," "Merlin," "Doctor Who" and "Life's Too Short."

In a press statement, he said, "I'm delighted to be making my West End debut at the Playhouse Theatre. I've been in hit TV shows and blockbuster Hollywood movies, but you are never really taken seriously as an actor until you've done a play. That's why I jumped at the opportunity to play Patsy in Spamalot."

To book tickets, contact the box office on 0844 871 7627 or visit www.spamalotwestend.co.uk.