Celebrities who have run marathons
At more than 26 miles, running a marathon is no easy feat, even for seasoned athletes -- but these challenges, open to the public, are known to attract contestants of all callings, including some of the world's more famous folk.
Take a look at these celebrities participating in full marathons.
Kevin Hart
FAMOUS FOR: comedian and actor, appearing in such films as "Ride Along" (2014), "Get Hard" (2015) and "Central Intelligence" (2016)
COMPETITIONS: New York City Marathon (2017) TIME: 4:05:06
Karlie Kloss
FAMOUS FOR: fashion model and entrepreneur
COMPETITIONS: New York City Marathon (2017) TIME: 4:41:49
Ethan Hawke
FAMOUS FOR: actor, appearing in such films as "Reality Bites" (1994), "Before Sunrise" (1995), "Training Day" (2001) and "The Purge" (2013)
COMPETITIONS: New York City Marathon (2015) TIME: 4:25:30
Pippa Middleton
FAMOUS FOR: sister of Catherine, Duchess of Cambridge; socialite
COMPETITIONS: Vasaloppet cross-country ski race (Sweden; 2012), Engadin SkiMarathon (Switzerland; 2013) Safaricom Marathon TIME: 3:56:33 (Kenya; 2015), Great Wall Marathon (China; 2016) TIME: 4:54:51
Bobby Flay
FAMOUS FOR: celebrity chef, restaurateur, media personality
COMPETITIONS: New York City Marathon (2002, 2006, 2010) TIMES: 4:08:45, 4:10:41, 4:01:37, London Marathon (UK; 2017) TIME: 4:21
Mario Lopez
FAMOUS FOR: co-star of the sitcom "Saved By the Bell," TV personality
COMPETITIONS: Boston Marathon (2002) TIME: 5:41:42; New York City Marathon (2011) TIME: 4:23:30
Will Ferrell
FAMOUS FOR: actor, starring in such films as "Step Brothers" (2008), "Anchorman" (2004), "Elf" (2003); former cast member of TV's "Saturday Night Live"
COMPETITION: New York City Marathon (2001) TIME: 5:01:56; Stockholm Marathon (Sweden; 2002) TIME: 4.28.22; Boston Marathon (2003) TIME: 3:56:12
(Pictured: Will Ferrell, during a news conference on April 20, 2003, in Boston. Ferrell was an official entrant in the 107th Boston Marathon.)
Katie Holmes
FAMOUS FOR: actor, work includes films "The Ice Storm" (1997), "Batman Begins" (2005), "Thank You For Smoking" (2005) and the TV drama "Dawson's Creek"
COMPETITION: New York City Marathon (2007) TIME: 5:29:58
Christy Turlington-Burns
FAMOUS FOR: supermodel, philanthropist
COMPETITIONS: New York City Marathon (2011. 2013) TIMES: 4:20:46, 4:35:32; London Marathon (UK; 2015) TIME: 5:29:58;
Boston Marathon (2016) TIME: 4:09:27(Pictured: Christy Turlington-Burns, participating in a 3-mile run/walk around Agawam Lake in the village of Southampton on Aug. 23, 2009.)