Gregory Marzhew (né Lelesiuao, born 4 April 1997) is a Samoa international rugby league player from New Zealand who plays as a winger for the Newcastle Knights in the NRL.

[4] In 2013, he moved to Logan City, Queensland, where he attended Woodridge State High School before being signed by the Gold Coast Titans.

[14] On 1 October 2017, he scored a try in the Eels' Holden Cup Grand Final loss to the Manly-Warringah Sea Eagles.

[22] Marzhew played a total of 17 games for the Gold Coast in the 2022 NRL season and scored nine tries as the club finished 13th on the table.

[23] In November, Marzhew was released from his Gold Coast contract and signed a new three-year contact with the Newcastle Knights starting in 2023, in a player swap with Chris Randall.

[24][25] In round 4 of the 2023 NRL season, Marzhew made his club debut and scored two tries for Newcastle as they defeated Canberra 24-14.