Brianna won the under-20 division of the 2017 470 junior world championships in Japan with her twin sister Courtney and finished eighth overall. The pair, sailing one of the 470 boats that Jo Aleh and Polly Powrie used in their last Olympic campaign, looked at home against crews who had finished in the top 10 at the open 470 world championships, even though they were clearly one of the youngest crews at the regatta. Their exploits saw them win the Junior Team of the Year award at the 2017 Harbour Sport Excellence Awards.
The Reynolds-Smiths in 2017 made the jump up from the 420 class, where they were sixth at the 2016 Aon Youth Sailing World Championships at Torbay and have set a target of sailing at the 2020 Tokyo Olympics.
2018 Oceanbridge NZL Sailing Regatta - 1st women & 4th overall
2017 Under 20 Junior 470 women world championships - 1st (8th overall)
2016 420 world championships - 46th (4th silver fleet)
2016 Australian Youth Championships, 420 women - 12th
2016 Aon Youth Sailing World Championships, 420 women - 8th
Teammate: Courtney Reynolds-Smith