Keiynan Lonsdale ( ; born 19 December 1991) is an Australian actor, dancer, and singer-songwriter. He is known for roles such as Oliver Lloyd in the ABC series Dance Academy (2012âÂÂ2013), Wally West / Kid Flash in the CW series The Flash (2015âÂÂ2023) and Legends of Tomorrow (2017âÂÂ2018), and Abraham "Bram" Greenfeld in the film Love, Simon (2018). His other films include ' (2015) and The Finest Hours (2016). Lonsdale has also worked as an MTV VJ and released original music recordings, including a studio album in 2020.
Lonsdale was born in Sydney, on 19 December 1991. He is the son of a Nigerian father and an Australian-born mother of Irish and Danish descent and he has eleven siblings.
Lonsdale's first acting job was at age 16, with a dancing part in the film ' (2007). The following year, he appeared in an episode of the Australian medical drama series All Saints. He was also a recurring cast member on the Australian teen drama series Dance Academy<nowiki/>'s second season (2012) in the role of Oliver Lloyd, being added-on as a regular character for the show's third, and final, season.
Lonsdale was then a VJ on MTV Australia and New Zealand for just under three years. He recorded and released a single on iTunes, "One and Only", in 2014. He then played a supporting role as Uriah Pedrad in ' (2015), the second film in the series, later briefly reprising the role in ' (2016). In 2016, his single "Higher" was included on Connor Franta's curated album Common Culture, volume 5. He then appeared in the historical drama The Finest Hours (2016) as Eldon Hanon, the youngest sailor involved in a rescue-at-sea in 1952.
In 2015, Lonsdale auditioned for the role of Jefferson Jackson for The CW's Arrow, although the role was given to Franz Drameh. Instead, he was cast as Wally West (the previously unknown son of Joe West) on CW's The Flash and became a regular supporting character on season two, and as Kid Flash on season three. In 2017, the character left The Flash and debuted on season three of Legends of Tomorrow. That year, Lonsdale also appeared in an episode of Supergirl.
In 2018, Lonsdale played Bram in the film Love, Simon, based on Becky Albertalli's novel Simon vs. the Homo Sapiens Agenda, about a teenage boy who struggles to come out. Lonsdale later said the role helped him come to terms with his own sexuality. Upon release, the film received positive reviews from critics, and was dubbed historically significant, as it was the first film ever released by a major studio to focus on a gay teenage romance.
In 2019, Lonsdale starred in Camila Cabello's music video for "Liar". He has also released several singles, including "Higher" (2015), "Good Life" (2017), "Kiss the Boy" (2018), and "Preach" (2018), as well as "Rainbow Dragon" (2019). Lonsdale released "Lonely Point of View" in 2023.
On 19 June 2025, Lonsdale was announced in the cast for a yet to be titled Postcard Bandit series for Foxtel. RUN premiered in Australia on Binge on 1 January 2026, with Lonsdale playing Detective Gary Porter in pursuit of the infamous 'Postcard Bandit'.
In 2017, Lonsdale came out on Instagram saying "I like girls, & I like guys", not identifying with a specific term or sexuality label. He later came out as gay in a 2022 interview with BuzzFeed.