Tarabasov, 22, has organized the party on the island of Mykonos and has invited her closest friends, reported Femalefirst.
The real estate agent proposed to the "Mean Girls" star in April after a whirlwind romance and while Lindsay has not yet confirmed the engagement, she insisted she is "really happy" with him.
Her father Michael Lohan has praised Egor as a "great influence" who wants to help his daughter get her career back on track.