The Mean Girls posted a clip of the couple dancing to Pharrell's hit track Happy to Instagram, while enjoying her birthday weekend on the island of Mykonos.
"#nofilter #LILOIS30 #loveandlight peace and happiness comes with a price but you can still be strong enough and wise enough from those that teach you @leicachick to have it all," she captioned the video.
She also posted a snap of a topless Egor cooking a barbecue lunch for them, writing: "My baby is cooking for all of us on another beautiful day filled with #LILOIS30 #loveandlight amen."
Lohan and Tarabasov have been living with each other in London since March, when she moved in after the pair had dated for seven months. But they're not walking down the aisle just yet.
While the couple is not engaged, Lohan is reportedly experiencing a "new life" in London.
"She's in a really good place," a source close to Lohan previously told WHO. "She's made a new life for herself."
This "new" Lindsay is probably going to keep her 30th birthday more low key than her party girl past might suggest.
"She's not partying as much like she used to," a source revealed. "She's doing really well and she is taking cooking classes with some girlfriends ... She has been happy staying out of the public eye. She likes staying in and flying under the radar and staying out of trouble."
Lohan recently opened up to Vanity Fair about her past – and how she doesn't have regrets, "per se.""I can't turn back time. But if I could, I would have listened more to my mother and gone back home to N.Y.C. earlier in life and chosen my friends more wisely," she said.