From prizewinner to prizewinner...

Former Vice President Al Gore took to Twitter on Friday to offer his congratulations to President Barack Obama for winning the 2009 Nobel Peace Prize.

Gore won the award in 2007 for his work on climate change, sharing the honor with the U.N. Intergovernmental Panel on Climate Change.

He offered simple congratulations:

Congratulations @BarackObama on winning the Nobel Peace Prize

Obama accepted his reward today at a Rose Garden appearance. The Nobel Committee cited Obama's "extraordinary efforts to strengthen international diplomacy and cooperation between peoples."