TVGuide reports via the Daily Express that Pegg confesses he sometimes has to remind himself he's only playing a role when working with actresses in such movies as How to Lose Friends & Alienate People.
He said: ''I get to work with a lot of lovely girls. I have to keep reminding myself what a wonderful wife I have. When you have to kiss Kirsten Dunst and Megan Fox, it's an odd profession to be in. You have to remember it's not because they like you.''
The Star Trek actor also admitted to having a crush on Carrie Fisher, even going as far as to queue with Star Wars fans at a convention in the hopes of meeting her.
''I met her once at Comic-Con; I lined up with a whole bunch of fans to meet her, she had no idea who I was. I had a chat and walked off grinning,'' he added.
The 42-year-old actor will next be seen in A Fantastic Fear of Everything, which is released in the UK on June 8.
Watch the trailer for A Fantastic Fear of Everything below: