Zac Efron is not only hot but he is a sentimental man. The "That Awkward Moment" actor and his costars Michael B. Jordan and Miles Teller made a visit to Facebook headquarters in Menlo Park, California, on Tuesday, January 14th to participate in a Q&A for their upcoming comedy.

According to E! News, the event gave the 26-year-old the opportunity to meet some of his biggest fans. However, it was Kirby Koo, who works in the company's sales development department that made a lasting impression on Efron.

After his visit the "Parkland" actor decided to write an emotional letter and share it on Instagram on Wednesday, January 15th.

The "High School Musical" alumni wrote, "@Curbiekoo, I have so much more I want to say. And I will-when I find the words. But I'll start here-When you stood up, with such strength, and sincerity and gave me perhaps the nicest compliment I've been paid...it meant so much more than that to me."

Zac Efron continued, "@Facebook and online media in general, show only half the picture-sure people see me, but I never get to see them," adding, "Yesterday was the first time in a very long time that I was able to look into your eyes and remember why I do what I do-and will never stop.

"I needed that, more than you will ever know and just wanted to say thanks-face to face soon I hope."

According to Koo, Efron says he's "single" (Even though he said that last year and was then spotted holding Lily Collins' hand at Disney World).

Responding to his kind words Koo wrote, "Zac, I am so incredibly touched by your note," adding, "Meeting you was always the dream, but I never could have imagined that you would respond with such genuine kindness and literally open arms.

"The impact you and your talent have had on me and so many millions of others should never be underestimated. Beyond the actor, thank you for being such a warm, generous person and I'd be humbled to consider you a friend."