Katherine Grainger finally got gold after silvers at three previous Olympics, this time with Anna Watkins on the double sculls (that's rowing, basically). Shows what great stuff you can do if you put your mind (and muscle) to it!
Gemma Gibbons - the judoka (that means someone who plays judo) won Team GB its first Olympic judo medal in 12 years!
Showing, again, that Team GB is amazing at rowing, Heather Stanning and Helen Glover got gold in the women's coxless pairs. Oh, and as well as that, Heather's a captain in the army!
Jessica Ennis came first in all but one event of the heptathlon, which is a whopping three-day-long event of seven different disciplines including hurdling, the javelin and the high jump. She fell back in the 800m, behind three other competitors, only to storm her way past them to comfortably win the gold! She could have rolly-pollied her way across the line and still won!
Lizzie Armitstead was the first Briton to win a medal at the 2012 London Olympics, getting a silver after coming second in the women's cycling road race.
After winning two golds at Beijing in 2008, it was expected that Rebecca Adlington would be a medalist again for the 2012 London games. And she didn't disappoint, picking up two bronze medals for swimming.
Zara Phillips - as well as being a royal, Zara Phillips is a mad keen horserider. Although she didn’t win an individual award thanks to a pesky pole falling down during the showjumping, her and the rest of the Eventing team – including the brilliant female Olympians Mary King, Tina Cook and Nicola Wilson – won a silver medal.
Zoe Smith, only 18, can lift 121kg over her head. That's more than twice her own weight. She didn't leave 2012 with a medal, but she got a British record AND she defeated Twitter bullies who teased her for having muscles. She pointed out that her and other weightlifters: "don’t lift weights in order to look hot" and "couldn't give a toss" what trolls thought.