Photos: When BIG boys chat....between Bill Clinton & George W.Bush

Former presidents Bill Clinton and George W. Bush poked fun at one another over their social media presences on Wednesday.

Clinton shared a photo showing him in a chair with a copy of Bush's newly-published book '41: A Portrait of My Father.

Bush's father is George H.W. Bush, who was the 41st President of the United States.

Clinton and George W. Bush served as the 42nd and 43rd presidents, respectively.

'Received my copy of #41 by #43, George W. Bush,' Clinton tweeted. 'Touching tribute! #HowAreYouSTILLNotOnTwitter #PresidentialTweeters.'

As of this writing, Clinton's tweet was retweeted 1,694 times and favorited 2,958 times.

George W. Bush then included a screenshot of Clinton's tweet on his official Instagram page.

'Thanks, 42! Hope you like the book about your pal, #41. #HowAreYouSTILLNotOnInstagram #PresidentialGrammers #BrotherFromAnotherMother.'

His Instagram snap currently has over 17,500 likes.

The Washington Post, which first reported on the presidential social media exchange, pointed out that Clinton asked Bush about his lack of Twitter presence in February.

'Happy #PresidentsDay – to #44 (@BarackObama), #43 (#HowAreYouNotOnTwitter?), #41 (@GeorgeHWBush), & #39. #PresidentialTweeters,' he wrote at the time.

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