March 13, 2016, 10 a.m. (ET)

Mikaela Shiffrin burst onto the international alpine skiing scene as a 15-year-old and has been wowing the world ever since. Now the ripe old age of 21 (on March 13), she doesn't show any signs of slowing down. In honor of Shiffrin's birthday, take a look back at some of her most notable accomplishments.

1. Made her world cup debut at age 15 in 2011.

2. Finished in the top 15 in her first two NorAm Cup races.

3. Won her first U.S. slalom national championship at age 16. 
In doing so, Shiffrin became the youngest American ever to win an alpine skiing national title.

4. Was named the 2012 World Cup Rookie of the Year.

5. Became the youngest U.S. woman to win an alpine world title.
Shiffrin earned this distinction when she won the 2013 slalom world championship.

6. Is the first American to win four world cup slaloms in a season.

7. Won three consecutive ESWA Golden Ski Awards from 2011-13.

8. Won a reindeer by winning slalom at the Levi World Cup in 2013.

9. Became the youngest slalom champion in Olympic history.
Shiffrin accomplished the feat at 18 years and 345 days old.

10. Was named one of ESPNW’s Impact 25 in 2014.

11. Earned two ESPY award nominations. 
Shiffrin was up for awards in the Best Female Athlete and Best Female U.S. Olympian categories in 2014.

12. Was named Snow Queen at the Zagreb World Cup in 2015.

13. Won a second slalom world championship in 2015.

14. Reunited with Emma Lundell, a fan battling leukemia. 
Shiffrin first met Lundell after her first world cup victory, and invited her onto the podium with her upon their reunion.

15. Won three consecutive world cup slalom season titles.
Shiffrin was the first skier in 20 years to accomplish this feat.

16. Honored with three Longines Rising Star awards (2013-2015).

17. Set the U.S. record with 14 career world cup slalom wins.

18. Tied for the third-most world cup victories by a U.S. woman.
Shiffrin is tied with Picabo Street behind just Lindsey Vonn (67) and Tamara McKinney (18).

19. Earned largest margin of victory in world cup slalom history.
Shiffrin blew away the field at the world cup in Aspen, Colorado by 3.07 seconds.

20. Has gone six for six in major finals in the last three seasons.
In the last three seasons, Shiffrin has won every Olympic, world championships and World Cup Finals slalom, going six for six.

21. Won six consecutive world cup slaloms.
Dating back to last season, Shiffrin won six straight world cup slaloms before injuring her knee in a training mishap. After sitting out for two months, she won her return race by almost half a second.