India, Sept. 15 -- Actor Akshay Kumar and former actor-writer Twinkle Khanna's son Aarav turned 23 on 15 September. Celebrating his birthday, his parents penned down the sweetest and witty birthday wishes for him on Instagram, complete with Akshay calling himself a 'sidekick' and Twinkle comparing him to 'air'. Take a look.

Akshay posted a selfie he took with Aarav, writing how, at his age, he was learning how to beat people up on screen. He wrote, "Happy 23rd, Aarav! When I was twenty three I was learning to beat up people on screen. it's a strange feeling now to see you beat me everyday right from tech to fashion to arguments on the dinner table."

He sweetly remarked about how his son has grown up now, adding, "Dekhte hi dekhte itna b...