Web star who has earned over 220,000 YouTube subscribers. 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 200,000 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 named Nick. She had another brother named David who passed away in 2013. She dated fellow social star Chase Hudson in 2015.
She has gained popularity for frequently appearing alongside her cousin Annie LeBlanc on the Bratayley YouTube channel.