Chris donned a well-cut black suit and pale blue shirt but Dawn stole the show in a bright blue cocktail dress.
The couple married this summer in a three-day celebration.
Amy Huberman and Brian O'Driscoll were among the celeb couples who attended.
The UK premiere of The Sapphires took place in London last night as part of the 56th BFI Film festival.
The Irish premiere of The Sapphires will be held at The Savoy cinema in Dublin this evening and promises to be a star-studded event.
The film, set in 1968, tells the story of four aboriginal singers who are put together by a talent scout as Australia's answer to The Supremes, and sing to US troops in Vietnam.
Chris plays the part of group manager Dave.