When Will Smith joined Instagram, our life got flipped turned upside down! The Suicide Squad star has amassed almost two million followers in just two days, and he didn’t waste any time trolling fellow celebrity Justin Timberlake.

Shortly after Will, 49, joined the platform, Justin, 36, reached out to welcome the actor and gave him some social media advice. “Welcome to Instagram @willsmith. This is called a #TBT. Which means Throwback Thursday,” he jokingly wrote. “Which is a photo you post on Thursdays that you like, that was taken in the past. I like this photo because it’s a photo of you and me. And we look like we are having a serious conversation about something very important. And that makes me feel important.”

In a show of appreciation, Will returned the favor by giving Justin some pointers for his upcoming Super Bowl appearance — and you know he mentioned Janet Jackson‘s wardrobe malfunction from the 2004 show. Watch the video below to see Will’s petty (but hilarious) message.

Fans were clearly loving Will’s sense of humor, even if it was at the “Sexy Back” singer’s expense. “This is EVERYTHING! Always crackin us up,” one follower wrote. Another added, “Oh! My! god! Why he on here actin a fool ALREADY.” However, Will made sure Justin knew he was just joking. “JT, you’ve been a friend and an ally for a lot of years. Nothin’ but Love 4ya!”

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Thanx @theellenshow!

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Along with some jabs at famous friends, Will’s Instagram has featured baby photos of the ’90s star, shots from a recent appearance on The Ellen Show, and a shoutout to his son Jaden Smith. “Yep definitely my seed,” he captioned a split of the father-son duo on the red carpet. The timing of his new account is also perfect, as Will is in the middle of promoting his new movie, Bright, which comes out on Netflix Dec. 22. Are you following the Fresh Prince yet?