42 years old (Born on March 23, 1983)
Happy Birthday, Mo Farah! You're officially another lap around life's track—but let's face it, you're probably still lapping the rest of us. Ever since your legendary double gold in the 5,000m and 10,000m at London 2012—where you made running look easier than blowing out birthday candles—you've been setting standards higher than most people's heart rates.Whether it's your iconic "Mobot" celebration or leaving competitors gasping behind you on that final stretch, you've given fans countless unforgettable moments. Here's hoping this year brings fewer ice baths and more cake slices—after all those medals, you've earned a cheat day (or two).