Lindsay Lohan has banned her father from attending a party she is throwing with her girlfriend Samantha Ronson.

The 'Mean Girls' actress is set to host a bash for their closest friends and family at Hollywood’s Peninsula Hotel on 8 August, but is reportedly worried her dad Michael Lohan will cause a scene if he attends because he doesn’t approve of his daughter’s lesbian relationship.

A source told The Daily Star: "Michael thinks Lindsay is just going through another phase and that she will end up getting hurt. He thinks it is embarrassing."

The 22-year-old actress is even believed to have hired additional security to ensure anyone not on the guest list doesn’t try and get in and ruin the party.

Lohan's mother Dina — who fully supports her daughter’s relationship — is said to be delighted her ex-husband won’t be attending the event.

Lohan — who spent time in rehab last year to be treated for alcoholism and drug addiction — recently spoke about her relationship with Ronson, the sister of super-producer Mark Ronson, as she celebrated her 22nd birthday earlier this month.

The actress said: "I just want to live a happy, healthy year, continue on the path that I've been on and be with the person that I care about, and my family."