When a celebrity couple starts dating, the number one rule is usually to keep the love affair on the down low.

Why? Because Hollywood has the reputation for coming between couples just weeks after they start seeing each other. If the couple can make it until they feel really comfortable with letting fans know they are an item, there's really only one way to do it – make it Instagram official!

Becoming Instagram official is the first time that the guy or the girl puts up a photo of the two on Instagram. Sometimes, it doesn't even have to be a photo of both of them. It can be a photo of their significant other with a caption that totally confirms these two are more than just friends.

In light of Selena Gomez posting a photo of The Weeknd and captioning it with the heart eye emoji, it made us think about all of the other photos that have been used to confirm two particular celebrities were totally head over heels! Everyone from Liam Payne and Cheryl Cole to Gigi Hadid and Zayn Malik to Ariana Grande and Mac Miller.

Even though some of these celeb couples have called it quits, it's still super fun to look back!

Click through the gallery and check out all of the photos that confirmed these couples were the real deal!