Gained fame on the 6-second video app Vine and as a member of the Magcon Boys when the group formed in September of 2013. He is also the younger brother of fellow web star Nash Grier. He launched a clothing line with Nash and another popular web star, Cameron Dallas, through Aeropostale in 2014. He is extremely active on Instagram where he's earned over 5 million followers.
He posted a video of his brother Nash on a rooftop which was retweeted by fellow Vine sensation Tiffiny Semashko. This publicity helped launch both he and Nash's success.
He joined DigiTour to travel across the country to meet and perform in front of some of his most passionate fans. He was selected as a cast member for season 21 of Dancing with the Stars.
His brother Will Grier went on to play quarterback in college for the University of Florida and West Virginia.