Christina Applegate has revealed she is a far stricter parent than the one she portrays in her latest movie.

The Anchorman actress plays Debbie Griswold in Vacation, a sequel to the 1983 hit National Lampoon’s Vacation, while The Hangover star Ed Helms takes on the role of her husband Rusty.

Both parents are constantly dealing with fighting, foul-mouthed children as they stumble from one holiday disaster to the next in the raunchy film, but Christina said she will be far sterner with her own child.

Christina Applegate arriving at the Vacation premiere with husband Martyn LeNoble
Christina arriving at the Vacation premiere with husband Martyn LeNoble (Eric Charbonneau/Invision)

Christina, 43, married Dutch musician Martyn LeNoble in 2013 and the pair have a four-year-old daughter, Sadie Grace.

At the Los Angeles premiere of the film Applegate said: “I can’t say what I’m going to be like when my kid is 16, I can’t say I’m not going to allow language to slip by, but right now my husband and I were laughing really hard in the car that we are super-conservative parents.

“You don’t look at us and think we are conservative, my husband is tattooed and a punk rocker and I’m in a movie like this but we are pretty conservative parents. I probably wouldn’t be quite like them.”

Ed and Christina fill the leading roles once occupied by Chevy Chase and Beverly D’Angelo, who both play cameos in the film, and Christina admitted she was anxious to please them.

Chevy Chase, Beverly D'Angelo, Christina Applegate and Ed Helms on the red carpet at the Vacation premiere
Vacation stars Chevy Chase, Beverly D’Angelo, Christina Applegate and Ed Helms on the red carpet (Eric Charbonneau/Invision)

“Chevy any Beverly are here right now and he hasn’t seen it so I hope they love it, I hope dad and mum love it, we are like their distant stepchildren.”

Ed is no stranger to sequels after three hugely successful Hangover movies but said this one is different.

“It’s a special sequel because it’s a thirty year sequel. You don’t see that very often, It’s very faithful to the Griswold universe and the Griswold mythology but narratively and comedically it’s very fresh and new.”

Vacation will open in UK cinemas on August 21.