It must be hard acting alongside Isla Fisher, considering she steals scenes in almost every movie she’s in. And in her new movie “Bachelorette,” expect more of the same.

The film, which straddles the line between “Bridesmaids” and “Old School,” stars Kirsten Dunst, Lizzy Caplan, and Fisher as BFFs who set out to send their friend Becky (Rebel Wilson) off into married life in style. But make no mistake, it’s Fisher who runs away with some of the better moments of this acid-tongued, cleverly-written film.

All of the actors in “Bachelorette” give strong comedic performances and add depth to their characters in ways we don’t usually expect from films of this genre. All of the film’s women are screw-ups in one way or another. But Fisher’s character, the insecure and intellectually challenged Katie, delivers the razor-wire dialogue with pristine timing. It’s one thing for a viewer to see a character’s flaws; it’s rare that we’re allowed in to bear witness to the dysfunction that causes them. And Fisher delivers.

“She’s not somebody who has any independent thoughts, so as a comedic tool, it’s extraordinarily funny to get to say anything you want,” she told VanityFair.com.

After “Bachelorette,” the next big film we can expect to see Fisher in is 2013’s “The Great Gatsby.” She’ll play alongside Leonardo DiCaprio. So while it may be easy to steal scenes away from Kirsten Dunst, grabbing the spotlight from Leo may be harder. But we think she’s up for the challenge.

“Bachelorette” is due out September 6.

J-Connection: Isla Fisher pronounces her first name “Eye-luh.” Or you can call her by her adopted Hebrew name Ayala, which she took after converting to Judaism in 2006 to marry Sacha Baron-Cohen.