Alexander Thomas Sedgwick (born February 17, 1999) is a British racing driver. He currently competes full-time in the GT World Challenge America for RennSport1. He previously competed in the Porsche Carrera Cup North America, NASCAR Whelen Euro Series, ARCA Menards Series West, Porsche Sprint Challenge North America, French F4 Championship, Renault UK Clio Cup, Ginetta Junior Championship, Ginetta Junior Scholarship, Super One Series, WTP LGM British Karting Championship, and cadet karting.

At the age of eight, Sedgwick began competing in local club-level karting competitions. He won the club championship at one of his local tracks in 2008, his first full season, and would move to the WTP LGM British Karting Championship in 2009. He would finish 23rd in the standings in 2009 before improving to ninth in 2010. In 2011, he would run with a professional organization for the first time. He won the WTP Cadet Winter Series before taking the British title, winning six out of seven races. Along with his championship, he broke the records for most wins in a season, becoming the first person to win all three heats, start from pole position, set the fastest lap and win the final race in the same event, and having the highest points total ever.

After his 2011 successes, Sedgwick moved up to the Junior ranks, racing in the Super One Series against the likes of Lando Norris and Zhou Guanyu. Despite racing the series with a much smaller budget than his competitors, he was able to post several top-five finishes.

In 2013, Sedgwick would enter the Ginetter Junior Scholarship, a competition in which young drivers are subjected to three days of driving, media, and fitness assessments, with a grand prize of a fully funded season in the Ginetta Junior Championship the following year. Despite never having driven a race car before and just having learned to use the clutch a week before, Sedgwick won the competition in only his first attempt. After winning the Ginetta Junior Scholarship, Sedgwick competed in a full season of the Ginetta Junior Championship. Sedgwick finished tenth in the final standings, scoring one class win during the season.

After taking a short break to complete his GCSE exams, Sedgwick would compete in the Magny-Cours round of the FFSA French F4 Championship, finishing inside the top ten in his single-seater debut. He also competed in the final two rounds of the Renault UK Clio Cup, qualifying fifth on debut at Silverstone and placing top-five at Brands Hatch.

Sedgwick made his international debut at the 2016 Dubai 24 Hours. He would finish seventh in his class. He again competed in Dubai in the 2017 Dubai 24 Hours, leading a brand new team to a second-place finish. That summer, he qualified on pole for and won the 12 Hours of Imola.

In 2018, Sedwick returned to full-time racing competition, placing 12th in the NASCAR Whelen Euro Series' PRO class, posting two top-fives and five-top tens, in addition to scoring four podiums within his class. Returning to the series in 2019, Sedwick opened with a class podium in Valencia. However, Sedgwick decided midseason to take a break from the series due to reliability issues with the car. He returned for the final round, again scoring a class podium by winning the Junior Trophy.

In 2020, during the COVID-19 pandemic lockdowns, Sedgwick took part in the EuroNASCAR Esports Series.