So chances are you haven't heard of Fu Yuanhui, unless you're really up to date with the Chinese swimming scene.
That's all about to change, largely thanks to her amazing reactions that make her the most excited and lovable athlete at Rio.
Yuanhui thought that she'd come fourth in the semi-finals of the 100m backstroke, and when a reporter told her she'd placed third her glee was palpable.
"I was so fast! I'm very satisfied!" she told the reporter. Yuanhui was particularly thrilled as it's been a tough year for the swimmer, and she's had to work hard to get back to form.
She then went on to win bronze in the 100m backstroke, tying with Canadian Kylie Masse. Yuanhui just COULDN'T BE MORE EXCITED about this.
She's the unofficial queen of amazing facial expressions. Just look at the time when she accidentally snaps her swimming costume's strap - we've all been there, Fu Yuanhui, we feel your pain.
This is not the first time Yuanhui has shown her personality - here she is showing her gold medal after China won the 4x100m medley last year at the World Aquatics Championship.
Check out Yuanhui's sheer excitement at being on the podium last year.
We don't think we've seen anyone ever have that much fun swimming - you go Fu Yuanhui.