As billionaire and business tycoon, Bill Gates, turned 60 on October 28, his wife, Melinda Gates had the warmest words to mark the special day.

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Mrs Gates shared the post on Wednesday, October 28 on her Facebook page.

The post which was accompanied with a photo of the seemingly happy couple rowing a boat, has garnered over 100,000 Likes.

Read on for Mrs Gates heartfelt words to her husband as he turned 60.

"When Bill first asked me out, he said, 'I was thinking maybe we could go out two weeks from tonight.' I told him he wasn’t spontaneous enough for me. So he called me an hour later to suggest we get together that night. He asked: 'Is that spontaneous enough for you?'

"Bill, after two amazing decades together, your humor, drive, intelligence, curiosity, thoughtfulness, optimism – and, yes, your spontaneity– are as wonderful as ever. On land, at sea, and everywhere in between, I’m glad you’re by my side. Happy, birthday."

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Happy belated birthday to this tireless business icon.