Riddell played junior football in Melbourne's north-east for the Eltham Panthers, crossing to basketball as a teenager due to "a greater long-term pathway".

[6] She made her debut in the club's inaugural match, a 36-point victory over Carlton at North Hobart Oval in the opening round of the 2019 season.

[7] Her season was cut short due to an ankle injury sustained the following week in North Melbourne's win over Greater Western Sydney when opponent Nicola Barr made an illegal shepherd behind play; Barr received a one-match suspension as a result.

[8] Riddell was named in the 2020 AFL Women's All-Australian team after a standout season in which she led the competition for kicks.

[37] Riddell was best afield in North Melbourne's win over West Coast in round 10, breaking the record for most disposals in an AFLW match with 42;[38] she polled the maximum ten coaches' votes to finish equal-second behind Emily Bates in that year's AFLW champion player of the year award,[39] and was selected in womens.afl's Team of the Week for round 10.

[42] Despite reports of a "big offer"[43] to join expansion club Sydney,[44] Riddell re-signed with North Melbourne in June 2022 for a further two seasons.