Anna Faris originally pitched her character in 'The House Bunny' as a crystal meth addict.

The beloved 2008 comedy saw Faris play former Playboy bunny Shelley Darlingson who becomes the house mother of an unpopular university sorority when she's kicked out of the Playboy Mansion and this week is the movie's tenth anniversary.

To mark the momentous date, the 41-year-old actress has taken to her Twitter account to share an array of facts about the film, including her pitch to the writers.

She tweeted: ''The House Bunny is 10 years old today - fun fact - I originally pitched to the writers that my character was a meth addict- they nodded their heads and said, ''or... she can be a house mom at a sorority! (sic)''

Faris also revealed that the scene in which she shocks her co-stars, Emma Stone, Katherine McPhee, Rumer Willis and Kat Dennings, with a deep scary voice - was totally improvised.

She said: ''Another fun fact - at the last minute, the director told me to do a funny voice as I was introduced to the sorority girls and that's what came out of my mouth - the shock on the girl's faces is very real.''

The 'What's Your Number' star also revealed she still owns several pairs of shoes she had to wear in the film as Shelley.

She said: ''I still have 5 pairs of Shelley's shoes - but I've forgotten how to walk in them - and I'm afraid I'll fall if I try. I think I had over 70 costume changes - if anyone wants to do the math for me please do.''