'I'm So Lucky to Be Your Dad': Bill Gates and His Daughter Pen Emotional Messages to Each Other On the Microsoft Co-Founder's Birthday The billionaire businessman and philanthropist turned 66 on Thursday.

By Emily Rella

Opinions expressed by Entrepreneur contributors are their own.

Leon Neal | Getty Images

What do you get one of the richest men in the world for his birthday? Well, if you're his daughter, a heartfelt message is truly priceless.

Bill Gates turned 66 on Thursday, and in honor of the occasionm, his newly married 25-year-old daughter, Jennifer Gates, penned an emotional note with a photo of her and her father on her wedding day.

The snapshot shows Jennifer in her wedding dress facing away from the camera but towards her father, who is looking back at her beaming with a smile while sitting on a stone wall.

Related: Bill Gates' Daughter, Jennifer Gates, Shares First Photos of Wedding Gown

"Grateful to learn from your example of endless curiosity, constant exploration and desire to help humanity," Jennifer penned. "Excited to hear about what you learn in this next turn around the sun."

The post received nearly 79,000 likes, as well as comments from friends and family, including Bill himself.

"Thanks for the birthday wishes, Jenn," he wrote. "I'm so lucky to be your dad."

The younger Gates married her longtime beau Nayel Nassar on October 16 in a lavish ceremony that reportedly cost an estimated $2 million. The venue itself, a 124-acre horse farm in North Salem, NY owned by the Gates family, is reported to have cost $16 million upon purchase.

"Jenn and Nayel, it's impossible to put into words how happy it makes me to see you filled with joy on your wedding day," Bill wrote on social media after the couple got hitched. "I'm so proud of you both for everything you've accomplished in your lives so far and everything you will do with your future together."

Bill Gates' net worth was an estimated $137.2 Billion as of early Friday afternoon.

Emily Rella

Senior News Writer

Emily Rella is a Senior News Writer at Entrepreneur.com. Previously, she was an editor at Verizon Media. Her coverage spans features, business, lifestyle, tech, entertainment, and lifestyle. She is a 2015 graduate of Boston College and a Ridgefield, CT native. Find her on Twitter at @EmilyKRella.

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