Lia Marie Johnson (born November 23, 1996) is an American actress, singer and Internet personality notable for appearing in various web series, including the Emmy-winning web series Kids React created by the Fine Brothers, and for her own vlogging and social media output. She is known for her starring role in the Nickelodeon movie Terry the Tomboy and for recurring roles in AwesomenessTV's Side Effects TV Series and My Music. In 2012 her personal YouTube channel, "Lia Marie Johnson", was reported to have received 16 million views. In 2014, this was reported to have increased to 39 million views and 705,000 subscribers, while her Instagram account was followed by 2.3 million followers. In a 2014 Adweek profile she was referred to as one of "10 of the biggest young stars on YouTube". In 2015 she was named one of the Top 100 YouTubers in the world.

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