Credit: Lindsay Lohan on Instagram Photo: Lindsay Lohan's Tinder Instagram

Lindsay Lohan's October 9 Instagram post offered two revelations about the actress's personal life — she uses dating app Tinder, and happened across the Tinder profile of her brother Michael Jr.

"Look who I just found on @tinderapp," she wrote in the caption to this screenshot. "Hey, bro."

Tinder is a social discovery app that uses users' Facebook profiles to match them up based on similar interest, mutual friends, and geographical location.

Quoth the official website: "The whole Tinder experience is designed to be familiar and emulate the way we interact in real life—digitally reproduced, enhanced, and made mobile" — but let’s get real, it’s just another “Hot or Not” app.

Granted, Tinder can supposedly be used for finding new friends and networkers, but same could be said for OKCupid. So let's be real — 99% of people are there to be shot by Cupid's arrow (by our rigorously unscientific guesstimation).

No word so far on how her 25-year-old brother feels about Lindsay's 436,000 Instagram followers and 7.2 million Twitter followers knowing the nitty-gritty details of his online dating strategy.

Should Michael Jr. be terribly embarrassed? Or is this just some harmless sibling teasing? Give us your take below!

Credit: Hollyscoop Photo: Oprah Grants Lindsay Lohan a Brand New Reality Show (VIDEO)
Dan Clarendon is an assistant editor at Wetpaint Entertainment. Follow him on Twitter and Google+!