Web star who has earned over 230,000 YouTube subscribers and more than 1 million musical.ly fans. She is known on social media as Officially MK. She is the cousin of the child stars of the Bratayley YouTube channel.
She became active on YouTube as early as March of 2015. She became a competitive level 4 Gymnast at the age of six.
She became popular on Instagram, earning over 240,000 followers to her officially.em.k account. She is an active athlete, competing in wrestling, basketball and football.
Her real name is Mary Kate Cooper. She has an older sister named Danielle and a brother. She had another brother named David who passed away in 2013. She dated fellow muser Chase Hudson in 2015.
She has gained popularity for frequently appearing alongside her cousin Annie LeBlanc on the Bratayley YouTube channel.