Telugu star Allu Arjun penned an emotional note on his son Ayaan's birthday on Friday, with a cute picture of the little boy with his birthday cake. Arjun took to social media to share the picture and his note.

"I used to think 'what is Love ?' all my life. Many times in the past I felt strong feelings but I was not sure if it was love. But after you came into my life I now know what LOVE is. You are the LOVE. I Love you Ayaan. Happy Birthday My Baby," the actor wrote.