Kihoro, born in January 1986 and raised in Kenya’s capital Nairobi, attended Shepherd’s Junior Primary School for her primary school and later moved on to Moi Girls’ High School, Nairobi. After her O levels, she enrolled in Moi University in the school of science and psychology. While at Moi University, she opted to audition for the third season of Tusker Project Fame.
In March 2009, Kihoro auditioned for the reality singing competition Tusker Project Fame . In 2011 she played Pet Nanjala in drama series Changes. The same year she played the leading role in the film, Miss Nobody that led her to be nominated at the 2011 Kalasha Awards for the “Lead Actress in Film” category. In the 2012, she was cast as one of the leads in musical drama Groove Theory. She portrayed Biscuit, Zamm’s (portrayed by Kevin Maina) love interest, in a story that revolved around the lives of five students at the fictional Victoria University.
In 2013 she appeared in reality show The Fattening Room, that led her fellow cast members and she to explore the customs and traditions of Efik people in south-east Nigeria. In 2014, she was cast as Nana, a 28-year-old editor in the series, Rush. She played alongside Janet Mbugua, Wendy Kimani, Wendy Sankale and Maryanne Nundo.
In 2015, she was cast as Maqbul Mohammed’s daughter in series, Makutano Junction.