Being selected in the team of the year in 2021. In 2022, Miller-Stephen signed with Parramatta to join their SG Ball team, playing Fullback.[citation needed]
In 2023, Miller-Stephen played in NSW Cup for Parramatta. In round 23 of the 2023 NRL season, Miller-Stephen made his NRL debut for Parramatta against the St. George Illawarra Dragons, scoring a try in a 26–20 win at Commbank Stadium.[2]
On 14 November, it was announced that Miller-Stephen would miss the entire 2024 NRL season after suffering a serious knee injury at training.[3]