Famous TikTok creator and YouTuber who runs channels called Mariah and Bill with her boyfriend Bill Ritter on both platforms. They have amassed over 9 million fans on TikTok, while their vlogs, challenges and pranks have earned them over 850,000 subscribers on YouTube.
Her first Instagram post was on October 23, 2014, and was a black and white selfie.
On November 7, 2018, she pretended to break up with her boyfriend. The video garnered over 300 thousand views in less than a month. Her and Bill's fans are known as the MarBle Squad.
She has a twin sister, Meghan. She began dating Bill Ritter in 2017.
Chelsea Kreiner is also shares a YouTube channel with her boyfriend.