Human beings are social animals. Thus, the time we spend with family is so important. So it only makes sense that Lindsay Lohan, 32, would consider a surprise visit from her younger sister Ali Lohan, 24, to be the best birthday gift around.

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The Parent Trap star was vacationing on the Greek island of Mykonos when Ali showed up unannounced. So she shared her joy to the world by posting this video on Instagram of baby sis frolicking in the waves of the Aegean Sea:

Lindsay’s excursion to Mykonos was also for business purposes, as she has been promoting her new venture Lohan Beach House, which opened in May. She has other business as well, as she is the co-owner of the Lohan nightclub in Athens alongside Greek restaurateur Dennis Papageorgiou.

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Lindsay is returning to acting later this year with a recurring role on the British sitcom Sick Note. But of course, everyone is wondering when we can expect to see that long-rumored Mean Girls sequel (which will almost certainly be disappointing, unless it is something completely unexpected, like a post-apocalyptic or supernatural horror scenario).