Teen heart-throb Zac Efron's latest film, the light fantasy comedy 17 Again pulled in enough teen greenbacks to finish in the top spot in this past weekend's box office. . It brought in more than $24 million in ticket sales in its debut- weekend - almost more than the next two top-grossing films combined.

The only sci fi flick to debut this weekend was the Spanish-language Sleep Dealer, whichwas shown only an a hanful of theatres in Los Angeles and New York. It debuted at No. 10 on the genre movie list and No. 37 overall with just over $30 thousand.

The sole genre film set to debut next week: The Mutant Chronicles also is set for a limited release befire going to DVD and a broadcast TV debut on the Sci Fi Channel later this summer.

Following are the Top 10 speculative fiction movies in release in North America for the weekend of April 17-19 , 2009.

RANK #. (Overall Rank) Title - Weekend Gross | Total Gross [Budget]

1. (1) 17 Again - $24 milllion | $24 million [N/A]
2. (3) Monsters vs. Aliens - $13 million | 163 million [$175 million]
3. (8) Knowing - $3.4 million | $74 million [N/A]
4. (10) The Haunting in Connecticut - $3.2 million | $52 million [N/A]
5. (11) Dragonball Evolution - $1.6 million | $7.8 million [N/A]
6. (15) Race to Witch Mountain - $0.7 million | $64 million [N/A]
7. (23) Coraline - $0.2 million | $75 million [N/A]
8. (26) Push- $0.09 million | $32 million [$38 million]
9. optical channel(30) The Curious Case of Benjamin Button - $0.06 million | $127.5 million [$150 million]
10. (37) Sleep Dealer - $0.03 million | $0.03 million [N/A]

Source: Box Office Mojo - list only includes science fiction, spy fi, fantasy and dark fantasy/horror titles.

OPENS: April 17, 2009
RATING: PG (mild violence, mild adult situations)
GENRE: Science Fantasy, comedy

Starring: Zac Efron, Leslie Mann, Thomas Lennon, Matthew Perry, Tyler Steelman, Allison Miller, Sterling Knight, Michelle Trachtenberg

Director: Burr Steers

Writer: Jason Filardi

Plot: What would you do if you got a second shot at life? Class of 1989, Mike O’Donnell is a star on his high school basketball court with a college scout in the stands and a bright future in his grasp. But instead, he decides to throw it all away to share his life with his girlfriend Scarlett and the baby he just learned they are expecting. Almost 20 years later, Mike’s glory days are decidedly behind him. His marriage to Scarlett has fallen apart, he has been passed over for a promotion at work, his teenage kids think he is a loser, and he has been reduced to crashing with his high school nerd-turned-techno-billionaire best friend Ned. But Mike is given another chance when he is miraculously transformed back to the age of 17. Unfortunately, Mike may look 17 again, but his thirtysomething outlook is totally uncool in the class of 2009. And in trying to recapture his best years, Mike could lose the best things that ever happened to him.

OPENS: April 3, 2009
RATING: PG (Cartoon violence)
GENRE: Science Fiction Comedy

Starring: Eric McCormack, Jenni Baird, Robert Patrick, Jody Thompson

Director: R.W. Goodwin

Writer: Steven P. Fisher based on the story by Steven P. Fisher and James Swift.

Plot: Aliens invade - and hilarity ensues. Set in 1957, Alien Trespass chronicles a fiery object from space that crashes into a mountaintop in the California desert, bringing the threat of disaster to Earth. Out of the flying saucer escapes a murderous creature – the Ghota, which is bent on destroying all life forms on the planet. A benevolent alien from the spaceship, Urp, inhabits the body of Ted Lewis (Eric McCormack) – a local astronomer – and with the help of Tammy, (Jenni Baird) a waitress from the local diner, sets out to save mankind.

OPENS: September 19, 2008
RATING: PG-13 (Language)
GENRE: Fantasy, Romantic Comedy

Starring: Ricky Gervais, Greg Kinnear, Téa Leoni

Director: David Koepp

Writer: David Koepp & John Kamps

Plot: He sees dead people... and they annoy him.

Bertram Pincus (Ricky Gervais), is a man whose people skills leave much to be desired. When Pincus dies unexpectedly, but is miraculously revived after seven minutes, he wakes up to discover that he now has the annoying ability to see ghosts. Even worse, they all want something from him, particularly Frank Herlihy (Greg Kinnear) who pesters him into breaking up the impending marriage of his widow Gwen (Téa Leoni). That puts Pincus squarely in the middle of a triangle with spirited results.

OPENS: September 19, 2008
RATING: PG (Some scary situations, Minor adult themes)
GENRE: Fantasy, Animation

Starring: (voices of) John Cusak, John Cleese, Steve Buscemi, Sean Hayes, Eddie Izzard, Jennifer Coolidge, Jay Leno, Molly Shannon

Director: Anthony Leondis 

Writer: Chris McKenna

Plot: In a land of mad scientists and diabolical inventions, what do you do when you’re born with a hunch on your back? You become an Igor. A hilarious twist on the classic monster movie, “Igor” tells the story of one Igor who’s sick of being a lowly lab assistant with a Yes Master’s degree and dreams of becoming a scientist. When his cruel master kicks the bucket a week before the annual Evil Science Fair, Igor finally gets his chance.

With the help of two of his experimental creations - Brain, a brain in a jar who’s a little light on brains, and Scamper, a cynical bunny brought back from being road kill, Igor embarks on building the most evil invention of all time, a huge, ferocious monster. Unfortunately, instead of turning out evil, the monster turns out as Eva, a giant aspiring actress who wouldn’t hurt a fly.

Just when the load on his back can’t get any heavier, Igor and his band of monstrous misfits uncover an evil plot that threatens their world. Now, they must fight to save it and prove that heroes come in all shapes and sizes.