Moviemaking buddies Robert Rodriguez and Quentin Tarantino are having quite a time trading off duties on their currently filming "Grind House" Dimension Films project, which has a roster of stars including Josh Brolin, Freddy Rodriguez and Rose McGowan.

"It’s super-cool. It’s a double feature, so you get two for the price of one," declares the "Spy Kids" and "Sin City" director. "Grind House" consists of a 75-minute zombie movie by Rodriguez, and a 75-minute slasher movie by Tarantino. As for how he and Tarantino are working on the production together, Robert explains, "He’s on my set operating the second camera, and then I’m going to photograph his for him so we kind of work together on both of them, but they’re separate movies. He wrote his script and I wrote mine."

As for when he’ll be going into production on the much-anticipated "Sin City 2," he says, "We’re going to start that probably in about six months."

MEANWHILE: We caught up with filmmaker Rodriguez at the MTV Movie Awards, which will air Thursday night. Among the big-ticket talents making the scene on the blue carpet outside were Jessica Simpson, Owen Wilson, Matt Dillon, Ludacris, Justin Timberlake, Sandra Bullock, Keanu Reeves, Kevin Spacey, Steve Carell, Will Ferrell and John C. Reilly the latter two in their "Talladega Nights" race car outfits plus Christina Aguilera, hostess with the mostess Jessica Alba, and Kate Beckinsale.

Beckinsale allowed that if she could be any superhero, it would be Wonder Woman. "My best friend Amber, who’s still my best friend since I was 5, had (Wonder Woman) Underoos and my mom wouldn’t let me have them and I’ve never gotten over it. I’d like to wear those for real," she admits.

Still, she lets us know that she is not chasing Joss Whedon’s big-screen "Wonder Woman" project though rumored to be in the running: "I think I’ve embarrassed my daughter enough."

Next, Beckinsale is gearing up for the June 23 release of her movie "Click," in which she co-stars with Adam Sandler. "You’ll actually be surprised by it," she says. "You’ll probably cry at the end of it. Adam will make you cry."

In the meantime, she and her family are ready for a vacation as they’re "headed to London for a little bit to hang out."

REALLY STRETCHING: With actor cum director/mogul Danny DeVito joining FX’s cult fave hit "It’s Always Sunny in Philadelphia, the mandate handed down for the second season was "Push the envelope even further," reports the sitcom’s resident babe, Kaitlin Olson. And that’s just what they’ll be doing when the show returns June 29.

"You’d be surprised at how flexible that envelope is," she quips."This year my character and my brother on the show decide we want to go on welfare, only you can’t just go on welfare. You have to have a drug problem or something so we decided we’re going to smoke just a little bit of crack. Of course, that doesn’t work out well for us." In another episode, she says, "I want to learn how to box to defend myself and I get talked into steroids. I think it’s a good idea, but it turns out it’s not." She adds, "Don’t be scared" of the antics of the Philly buddies. "We always get it in the end. We’re lovable losers though I don’t think we ever learn our lesson. That’s why there’s always a next episode."

DeVito is in all ten episodes of the new season and Olson says, "He fits right in. A lot of our fans from last year were a little bit worried because the four of us (Olson, Rob McElhenney, Charlie Day and Glenn Howerton) clicked so well as a group, they were thinking bringing in a star was going to ruin it. But it really doesn’t.Danny plays my dad and he’s the exact same type of character that we are only older. He doesn’t mind saying things that are a little inappropriate, outside the box, and irreverent."

NO DEGREES: "The Closer’s" Kyra Sedgwick is candid when it comes to the secret of her 18-year marriage to Kevin Bacon: "Most of it is just luck." Warming to the subject in an interview in the next issue of Life magazine, she goes on, "I also was, am, and continue to be madly in love with and endlessly interested in himWe’ve been married 18 years, but sometimes I feel like we’re newlyweds. It sounds corny, but my heart skips a beat when he walks in the room." Aww.