We were incredulous when we learnt who had won the award.
Advanced English Dictionary
+adjective not willing or not able to believe sth; showing an inability to believe sth: 'Here?' said Kate, incredulous. + an incredulous look / face Compare: CREDULOUS incredulity noun [U]: a look of surprise and incredulity incredulously adverb: He laughed incredulously.
Random quote: Everything in the universe goes by indirection. There are no straight lines.: Ralph Emerson