The daughter of former rally driver Chris Munnings, she currently competes in the electric off-road racing series, Extreme E, for Andretti Altawkilat XE.

[3] Munnings, whose original ambition was to become a vet,[8] had her interests geared towards rallying from a young age by regularly visiting her father's workplace.

[9] She was able to execute a perfect handbrake turn by thirteen and provided driving lessons to her friends on a specially constructed circuit built by her father on the family farm.

[10] Munnings made her ERC début at the Ypres Rally behind the wheel of a Peugeot 208 VTi R2 for Saintéloc Junior Team.

[17] Her fourth event of the season in the 2017 Barum Rally Zlín saw her take stage class victories in spite of changing a broken wheel earlier on because of understeering on a narrow low-speed corner and hitting a kerb.

[18] Munnings's participation in the Rally di Roma Capitale was in doubt because of budget problems, but she confirmed her entry shortly before the event started.

[1] Munnings received backing from the energy drinks company Red Bull UK for the upcoming season.

[24] In 2021, Munnings is competing in the new all-electric off-road racing championship Extreme E for Andretti United alongside teammate Timmy Hansen.

In qualifying for the season-opening Desert X-Prix, she took over from Hansen with a right-rear puncture, but was able to bring the car home in 4th place on three wheels.

[25] Munnings was the original host of the CBeebies television programme Catie's Amazing Machines in 2018,[26] in which she controlled large and fast vehicles.