Ashton Kutcher, who plays the retro dummy Kelso on Fox's "That '70s Show", has signed on for a psychological thriller.

Ashton will star with Amy Smart ("Felicity," "Road Trip") in "The Butterfly Effect", about a man trying to dredge up his repressed childhood memories, zap2it.com reports.

In the movie, Ashton's character uses a technique that allows his current mind to go back in time and enter his childhood body. The character then tries to change the past but realizes, when he returns to the present time, that his actions have consequences.

The movie is being written and directed by J. Mackye Gruber and Eric Bress, the co-writers of the upcoming "Final Destination 2".

--AllPop

The Fox network's retro comedy will celebrate its 100th episode with an all-musical instalment.

"That '70s Show" will celebrate the landmark episode in April and will feature a guest appearance from The Who's Roger Daltrey who plays a music teacher, Entertainment Weekly reports.

The plot of the musical episode takes place in the brain of Fez (Wilmer Valderrama) prior to his performance at his school's Spring Sing production. Some of the songs performed in the musical episode include "Happy Together" and "Love Hurts".

--AllPop

One couple on "That '70s Show" is being threatened by a new character.

Chris Masterson usually sticks to life on the "Malcolm In The Middle" set as Francis but he'll be popping up on "That '70s Show" now and then in an attempt to destroy an onscreen relationship.

As the rocky relationship between Kelso (Ashton Kutcher) and Jackie (Mila Kunis) gets even rockier, Chris's geeky cheese-shop-manager character will try to hit on Jackie.

"It's cool because it's a turning point for them, and it's exciting to be part of that," Chris told TV Guide. "They've had this relationship for quite a while and I get to come in and break it up and I end up making out with Jackie!"

Chris is the brother of Danny Masterson who plays Steven Hyde on "That '70s Show" and is dating Laura Prepon who plays Donna on the retro comedy.

--AllPop

Fans of "That '70s Show" shouldn't expect the new, "'80s Show" to be a direct spin-off of the comedy teen comedy.

Although the head of Fox Entertainment, Gail Berman, is hoping that fans of "'70s" will be curious enough to check out the new sitcom, she says there will be definite differences between the two, Entertainment Weekly reports.

"While '70s' deals with a group of high school buddies and the insular world of their family and neighbours, '80s' is about a group of young adults making their way in the world and the struggle of art versus commerce," Berman told Entertainment Weekly.

The show will revolve around a group of twentysomethings. The cast will include Brittany Daniel, who's appeared on "Dawson's Creek" and "Sweet Valley High".

"'80s Show" is expected to debut in the fall of 2002.

--AllPop

The creator of the light-hearted teen comedy "That '70s Show" revealed a nasty streak during a recent e-mail exchange.

The online argument took place between "'70s" creator Mark Brazill and "Undeclared" and "Freaks And Geeks" creator Judd Apatow, The New York Post reports.

Seems "'70s Show" star Topher Grace accidentally started the e-mail war when he expressed an interest in doing a guest spot on Apatow's "Undeclared". Topher and Apatow originally thought Topher's guest appearance wouldn't cause problems since both shows are on the Fox network.

It turned out to be a huge problem for Brazill.

The trouble started after Apatow, who met Brazill about 10 years ago, tried calling him about Topher's potential "Undeclared" spot, but his calls went unanswered.

The "Undeclared" mastermind then sent Brazill an e-mail asking why Brazill had a problem with him. He received this e-mail back:

"Yeah, we were friends in the early '90s," Brazill wrote. "And if you don't recall what happened, I'll remind you. I had a pilot at MTV called 'Yard Dogs' about a rock band living in Hollywood. I told you about it and you proceeded to completely rip it off, storyline and all, for 'The Ben Stiller Show.' When it turned up on your show, everything went away overnight . . . I had no job, no money, nothing."

Apatow replied and said he wasn't sure what Brazill was referring to, and that since "The Ben Stiller Show" was less than a success, it shouldn't have affected Brazill's program.

But the reply seemed to have further infuriated Brazill, who responded by calling Apatow a "showbiz weasel" and telling him to "get cancer".

Apatow apparently tried to remain level-headed through the heated exchange, writing back: " I wish you had called me about this years ago. I'm sure we could have worked it out. Try not to be so angry. Not everyone is as bad as you think."

But Apatow's friendly e-mail only fuelled Brazill's fire, and the "'70s Show" writer finished the argument by saying:

"We'll never be 'friends'... I respect you zero."

Brazill is reportedly ashamed about his behaviour. He told the Page Six staff that he regrets his e-mail comments and that he's "apologized to Judd".

--AllPop

Gwyneth Paltrow's rumoured new boyfriend, Luke Wilson, is paying a visit to Fox's comedy "That '70s Show".

Starting in February, Luke, who appears with Gwyneth in the upcoming "The Royal Tenenbaums", will guest in three episodes of the teen series, zap2it.com reports.

The actor will portray Casey, Kelso's (Ashton Kutcher) troublesome older brother who begins dating Donna (Laura Prepon), which causes some trouble with her friends.

Wilson recently starred in "Legally Blond" with Reese Witherspoon.

--AllPop

"That 70s Show" actor Topher Grace (a.k.a. Eric Forman) is reuniting with his former "Traffic" co-star.

Topher, who appeared in the Oscar-winning flick "Traffic" last year playing a drug-dealing rich kid, will get a chance to share the screen with Erika Christensen again, zap2it.com reports.

Erika played Topher's girlfriend in "Traffic". On "That 70s Show", she'll guest as a new Pricemart cashier. Eric's father Red (played by Kurtwood Smith), wants to spark some romance between his son and the new Pricemart employee, but that doesn't happen.

"But she's interested in [Red], and he's completely flummoxed," Kurtwood told zap. "There's a fun scene with Kitty when she figures it out, and he tries to convince her it's all Eric's fault. Then he starts having nightmares about it, and there's a little fantasy sequence."

The episode, which airs Tuesday (Nov. 27) on Fox, is titled "Red And Stacey".

--AllPop

The creators of "That 70s Show" are jumping a whole decade ahead for their next project.

The Hollywood Reporter said Fox TV has given a 13-episode commitment for the unnamed series, which is set in the 1980s.

Although details of the series were vague, the new show will be an ensemble piece lampooning the Reagan administration years, and will not be a spin-off from "That 70s Show," the report said.

The series will be produced by Carsey Werner Mandabach and will be developed by "That 70s Show" creators Mark Brazil and Bonny and Terry Turner and executive producer Linda Wallem, the report said.

No casting has been mentioned yet. The show is targeted as either a mid-season replacement or a debut for the fall 2002 season.

--AllPop

"That 70s Show" star Ashton Kutcher's plan to help out a charity by competing on "Who Wants To Be A Millionaire" has been scotched by Fox, which airs Kutcher's sitcom.

Variety reports that ABC had agreed to postpone Kutcher's turn on "Millionaire" to a night on which it wouldn't compete with "That 70s Show," and Fox appeared ready to consent, even though "Millionaire's" celeb episodes are airing during the key sweeps period, which helps determine advertising rates.

But on Thursday, one day before the taping, Fox reneged and refused to allow Kutcher to appear on the show, Variety said.

The young actor, who also starred in the hit teen movie "Dude, Where's My Car?", had hoped to compete and win money for a University Of Iowa support centre for families of transplant patients -- Kutcher's brother underwent a heart transplant, Variety said.

To console the actor, Fox is donating $32,000 to the centre.

"Ashton is saddened he can't go on the show, but he respects his network's decision and is grateful they're giving $32,000 to the hospital and the families that need it," a representative for Kutcher told Variety.

--AllPop