Celyn made her international debut in 2022 in the O’Neills Wales Test Series against the Republic of Ireland. She gained both of her international caps at this tournament, the second against the Isle of Man. Her speed is something to look out for on court along with her flare and personality off the court.
Celyn made her debut in the NSL in 2022 for Celtic Dragons (now known as Cardiff Dragons). In the 2024 season, Celyn has been named as a contracted player in the Leeds Rhinos Squad.