Warner made his international debut for Australia in a Twenty20 International against South Africa at the Melbourne Cricket Ground on 11 January 2009.
Warner was the first man since 1877 to represent Australia without having played in a first-class match.
He made an immediate impact, scoring 89 off 43 balls with 7 fours and 6 sixes, including the then second-fastest fifty in Twenty20 International history.
His 89 was the second highest score on Twenty20 international debut; and the equal fifth highest score ever in Twenty20 internationals.

He made his Test debut on 1 December 2011 against New Zealand at Brisbane, Queensland in the first Test of the Trans-Tasman Trophy due to an injury to Shane Watson.
He made three runs in the first innings.
In the second innings he scored 12 not out off four balls, scoring the winning runs with a pull shot through mid on.

On 23 February 2010, playing a Twenty20 international against the West Indies at the Sydney Cricket Ground, he made 67 off just 29 balls.
His 50 came in just 18 balls, breaking his old record of 19 and it became the second fastest 50 in Twenty20 International history after Yuvraj Singh.
Warner made his international debut for Australia in a Twenty20 International against South Africa at the Melbourne Cricket Ground on 11 January 2009. Warner was the first man since 1877 to represent Australia without having played in a first-class match. He made an immediate impact, scoring 89 off 43 balls with 7 fours and 6 sixes, including the then second-fastest fifty in Twenty20 International history. His 89 was the second highest score on Twenty20 international debut; and the equal fifth highest score ever in Twenty20 internationals.
He made his Test debut on 1 December 2011 against New Zealand at Brisbane, Queensland in the first Test of the Trans-Tasman Trophy due to an injury to Shane Watson. He made three runs in the first innings. In the second innings he scored 12 not out off four balls, scoring the winning runs with a pull shot through mid on.
On 23 February 2010, playing a Twenty20 international against the West Indies at the Sydney Cricket Ground, he made 67 off just 29 balls. His 50 came in just 18 balls, breaking his old record of 19 and it became the second fastest 50 in Twenty20 International history after Yuvraj Singh.
David Warner (cricketer)