George W Bush shared a joke with Barack Obama while Bill Clinton was speaking at a hurricane fundraiser.

The mischievous 43rd president smiled and appeared to whisper something to Obama behind Bill Clinton's back at the Saturday night fundraiser in College Station, Texas for areas ravaged by 2017's hurricanes.

Obama gives a hearty open-mouthed grin, while Bush smirks at the One America Appeal Campaign for Hurricane Recovery.

Clinton was saying at the time of the joke: 'But can be a new beginning if we just do what we oughta do and prove that the heart of America without regard to race or religion or political party is greater than our problems.'

This is followed by much applause from the audience and the two jolly former presidents.

George W Bush appeared to share a joke with Barack Obama behind Bill Clinton's back

Clinton was speaking at a hurricane relief fundraiser in College Station, Texas attended by all five former living presidents

Obama is pictured enjoying an open-mouthed laugh while Bush smirks

One tweeter wrote: 'W cracking a joke to Obama while Clinton gives a speech is me in middle school.'

Another said: 'They look like brothers cracking jokes in church while the priest is giving a sermon. My mom would have kicked my a**, and then prayed.'

Former Presidents Jimmy Carter, George HW and George W Bush, Bill Clinton and Barack Obama gathered to raise money for the areas ravaged by the latest hurricanes at the fundraiser.

The former Commanders-in-Chief heaped praise on each other despite their political differences and called for unity and bipartisanship in tackling the issues facing areas trying to recover in the southeastern US as well as Puerto Rico and the US Virgin Islands.

However, one man was notably absent from the gathering - the sitting president Donald Trump. It is unclear whether Trump was invited to the event but he did not take to the stage and instead recorded a short video message that was shown earlier in the evening. In it Trump praised the work of his predecessors he called some of America's finest public servants.

None of the other politicians addressed Trump in their speeches - and did not mention him altogether.

Tweeters noticed the amusing exchange between George W Bush and Barack Obama

It comes after George W Bush caused a stir with his comments targeting Trumpism. He was joined on stage with his father George H W, who at 93 appeared in a wheelchair at the event.

Carter was the first to address the audience. He touted Americans' volunteerism while urging the public to donate to Habitat for Humanity, an organization that helps build homes for the poor.

Clinton also addressed the crowd, praising his predecessor in the Oval Office, George HW Bush.

The next to address the crowd was Obama, who received the loudest ovation from the audience.

Obama said that the storms and the response brought out the best in America.

Obama also praised George HW Bush, calling him 'an outstanding American, somebody who has always shown grace and character and courage and served America nobly throughout the years.'

'We are so proud to be here with him today,' Obama said. 'He sets an example for all of us, as does First Lady Barbara Bush.'

The five living former presidents appeared together for the first time since 2013 on Saturday at a concert to raise money for victims of devastating hurricanes in Texas, Florida, Puerto Rico and the US Virgin Islands

George W. Bush (far left), Clinton, and Obama join the Texas A&M choir during the singing of the national anthem

George HW Bush's wife Barbara (right) and George W Bush's (center) wife Laura Bush (left) were in the audience

Bush's son, George W Bush, spoke briefly about his father, saying that the audience loves him. Those in attendance clapped in thunderous applause and gave the 41st president a standing ovation.

Earlier on Saturday, Trump recorded a video greeting that avoids his past criticism of the former presidents and called them 'some of America's finest public servants.'

On Thursday, George W Bush decried 'bullying and prejudice' while defending immigrants and trade in a New York speech that appeared to be a sweeping, thinly veiled critique of Trump.

The last time the five were together was in 2013, when Obama was still in office, at the dedication of George W Bush's presidential library in Dallas.

President Donald Trump recorded a message for the concert in which he praised his predecessors as 'some of America's finest public servants'

Pop star Lady Gaga was the surprise guest at the event. 'Sometimes life gives us a million reasons to give up, but we stick around,' Gaga said before beginning her two-song set

Lady Gaga even found time to pose with the five living presidents back stage

Last month, Barack Obama, George W Bush and Bill Clinton were all smiles as they attended the Presidents Cup in New Jersey.

The trio posed for photos with players and wives on each team during the opening ceremony.

Obama was sporting a pair of dark shades as he flashed his signature smile and shook hands with some of the players.

Each former president also wore their Presidents Cup polos to the event.

It was the first time three US presidents have attended the matches at the same time since this event began in 1994, named after the highest office in the land.