Alice Dearing is set to make history and become the first Black woman to compete for Team Great Britain in a swimming event at the Olympic Games after booking her place at Tokyo 2020.
The 24-year-old finished fourth in a 10km marathon race in Setubal, Portugal on Saturday to qualify for this summer's Olympics.
The top nine finishers were guaranteed a place in Tokyo and Dearing clocked a time of two hours, two minutes and one second.
Hungary's Anna Olasz won the event in 2:01:55, with Spaniard Paula Ruiz finishing second and Canadian Kate Sanderson third.
"I'm really excited, relieved, grateful, it's a huge mix of emotions," Dearing told British Swimming after the event. "I can't quite believe it, I've been daydreaming about this day for the past year and a half, ever since the first lockdown came in.
"So to have the day arrive, have everything fall into place, thankfully, have such a great team around supporting me, to get in, swim to my potential and qualify the Olympic Games place is just a bit surreal right now, I can't quite process it. It'll probably take me quite a while to sleep tonight!
"I'm just so grateful to everybody who has helped me along the way, everyone who has believed me, encouraged me.
"When I was younger, I never really thought about being an Olympian -- I thought 'oh wow, it would be so cool,' but I knew how much hard work went into it and honestly didn't think I was cut out for it.
"So I'm really proud to have proved myself wrong, in a way, and to achieve beyond my wildest dreams.
"I was happy to make nationals, I was happy to make regionals, I was happy to make counties -- and to be put up for selection for the Olympics, it's an incredible achievement and I'm so relieved and grateful and happy for everything I've invested."
Dearing, who won the World Junior Championships in 2016, is also set to become only the third Black swimmer for Team GB at the Olympics after Kevin Burns and Paul Marshall.
Burns competed at the 1976 Olympics while Marshall won a bronze medal in the 1980 Olympics in Russia.
Meanwhile, Team GB teammate Hector Pardoe qualified for Tokyo 2020 by winning the men's 10km event on Sunday but British swimmers Danielle Huskisson and Tobias Robinson missed out.