Yuvraj Singh (born 12 December 1981) is a former Indian international cricketer who played in all formats of the game. He is an all-rounder who batted left-handed in the middle order and bowled slow left-arm orthodox . He has won 7 Player of the Series awards in ODI cricket, which is joint 3rd highest by an Indian, shared with former Indian captain Sourav Ganguly. He is also the son of former Indian fast bowler and Punjabi actor Yograj Singh.

Yuvraj was a member of the Indian cricket team in One Day Internationals (ODIs) between 2000 and 2017 and played his first Test match in October 2003. He was the vice-captain of the Indian ODI team between 2007 and 2008. In a match against England at the 2007 World Twenty20, he famously hit six sixes in one over bowled by Stuart Broad — a feat performed only three times previously in any form of senior cricket, and never in an international match between two teams with Test match status. In the same match, he set the record for the fastest fifty in Twenty20 Internationals and in all T20 cricket, reaching 50 runs in 12 balls, which still stands as a record for fastest half century in International cricket. During the 2011 World Cup, he became the first player to take a 5-wicket haul and score a 50 in the same World Cup match. During the 2011 World Cup, Yuvraj Singh played eight innings in nine matches and scored 362 runs with a remarkable average of 90.50. He also took 15 wickets in the tournament, maintaining an economy rate of 5.02.

In 2011, Yuvraj was diagnosed with a cancerous tumor in his left lung and underwent chemotherapy treatment in Boston and Indianapolis. In March 2012, he was discharged from the hospital after completing the third and final cycle of chemotherapy and returned to India in April. He made his international comeback in a Twenty20 match in September against New Zealand shortly before the 2012 World Twenty20.

In 2012, Yuvraj was conferred with the Arjuna Award, India's second highest sporting award by the Government of India. In 2014, he was awarded the Padma Shri, India's fourth highest civilian honour. At the 2014 IPL auction Royal Challengers Bangalore bought Yuvraj for an all-time high price of ₹14 crore and, in 2015, the Delhi Daredevils bought him for ₹16 crore making him the second most expensive player ever to be sold in the IPL until Chris Morris was sold to the Rajasthan Royals for a record ₹16.25 crore in February 2021. In February 2014, he was honoured with FICCI Most Inspiring Sportsperson of the Year Award.

On 10 June 2019, Yuvraj announced his retirement from all forms of International cricket. He last represented India in June 2017, against the West Indies. His request for a return to domestic cricket and IPL was turned down by BCCI for participating in Global T20 League in Canada and T10 league.