The 'Mean Girls' actress is set to host a bash for their closest friends and family at Hollywood's Peninsula Hotel on August 8, 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 Britain's Daily Star newspaper: "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.
Lindsay's mother Dina - who fully supports her daughter's relationship - is said to be delighted her ex-husband won't be attending the event.
Lindsay - who spent time in rehab last year to be treated for alcoholism and drug addiction - recently spoke about her relationship with Samantha, 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."
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