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Topher Grace (search), who starred in "That '70s Show," has joined the cast of "Spider-Man 3."

Although his character wasn't revealed, director Sam Raimi (search) said Grace "will be perfect for the complexities of the role we are developing."

"Topher Grace is an extraordinarily talented actor," Raimi said in a statement Thursday. "I couldn't be more excited about the direction we are taking the continuing adventures of Peter Parker."

The 26-year-old actor will join franchise stars Tobey Maguire (search), Kirsten Dunst and James Franco. "Sideways" star Thomas Haden Church also has been announced as a cast member in the film, which is set for release in May 2007.

Shooting on "Spider-Man 3 (search)" is expected to begin next year.

Grace's screen credits include "In Good Company," "Win a Date With Tad Hamilton!" and "Mona Lisa Smile."