Formula One is known to have huge personalities within its ranks, and F1 races draw celebrities from all over the world. There was no shortage of big names in attendance in Austin, from within the sport and outside of it. Here's a look at some of the people that make up Formula One — and the stars who are avid fans.
Yes, that's Matt LeBlanc, aka Joey from Friends.
The Formula One paddock is an elite, surreal place, completely unlike anywhere else.
Lewis Hamilton, 2008 Formula One World Champion, and current driver for Mercedes AMG.
In the paddock, each team has special VIP areas where team members, drivers and guests can relax.
Chef Gordon Ramsay needs no introduction.
The UK's Sky Sports broadcast team has no shortage of talent. From left to right, Simon Lazenby, Johnny Herbert (Formula One race winner, 24 Hours of Le Mans overall winner) and Damon Hill (1996 Formula One World Champion).
Mark Webber, current driver for Infiniti Red Bull Racing.
Bernie Ecclestone (shown at actual size) is the rights holder for Formula One and largely responsible for making F1 into the larger-than-life spectacle that it is today.
Grid girls, Texas-style.
Adrian Newey is the chief technical officer for Infiniti Red Bull Racing. The cars he has designed have won 10 World Constructors Championships, including the last four years straight for Red Bull.
The BBC broadcast team of Suzi Perry and 13-time Formula One race winner David Coulthard.
Legendary Le Mans winner Derek Bell.
Sebastian Vettel, 2010, 2011, 2012 and 2013 Formula One World Champion. Current driver for Infiniti Red Bull Racing.
McLaren director Martin Whitmarsh and drivers Sergio Perez and Jenson Button answer some uneasy questions in a small press conference. It was announced that Perez was leaving the team earlier in the week.
Jenson Button, 2009 Formula One World Champion, and current driver for Vodafone McLaren Mercedes.
1978 Formula One World Champion and racing legend Mario Andretti, right. Andretti is also the official circuit ambassador for COTA.
1975, 1977 and 1984 Formula One World Champion Niki Lauda. The feature film Rush,was based on his racing career in 1976.
Fernando Alonso, 2005, 2006 Formula 1 World Champion, and current driver for Scuderia Ferrari.
Jackie Stewart is the 1969, 1971 and 1973 Formula One World Champion. He can always been identified by his tartan pants.
Christian Hornmer is the team principal of Infiniti Red Bull Racing.