John McCain's family celebrates his 81st birthday: 'You have kept me laughing for 37 years,' says wife Cindy

"You have kept me laughing for 37 years," tweeted wife Cindy McCain.

"Thank you for all the birthday messages! It's been wonderful celebrating with family in #Arizona doing the things we love most," tweeted Sen. McCain. Along with the tweet were photos of him hiking, blowing out birthday candles, barbecuing, and with wife Cindy and daughter Meghan.

"Happy Birthday to my wonderful husband @SenJohnMcCain," tweeted Cindy McCain on Tuesday, with an image of a beach with hearts carved into the sand. "You have kept me laughing for 37 years."

Sen. McCain also posted a birthday greeting video, writing, "Thank you to our Iranian American friends from #Arizona for the birthday wishes!"