PHOTO: New OKC coach Billy Donovan thanks Florida fans in full-page newspaper ad

It's so hard to say goodbye.

Just ask Billy Donovan, the newly-hired head coach of the Oklahoma City Thunder.

Donovan spent two decades at the helm of the Florida Gators, racking up two national titles, four Final Four appearances, six conference titles, and four conference tournament titles.

The grateful coach took out a full-page ad in Sunday's edition of the Gainesville Sun to thank Gators fans for their support over the years.

Michael White, hailing from Louisiana Tech, has been hired to replace Donovan.