Brothers Rob and Dave Kearney, Rory Best, Robbie Henshaw, Ian Madigan, Conor Murray and Cian Healy all attended the wedding. Devin and Mary Toner, Jordi Murphy, and Sean O'Brien were also on the guest list.
McGrath (28) proposed to radiographer Corcoran earlier this year.
The couple, who have been in a relationship for more than five years, chose the stunning cliff-side Tivoli Hotel in the rustic seaside town of Carvoeiro to exchange vows.
The outdoor ceremony was followed by a lavish four-course meal in the sprawling gardens of the hotel.
The speeches were beamed onto a giant screen and following the dinner guests were treated to a spectacular fireworks display.
The bride wore a simple yet elegant white gown and her bridesmaids were dressed in blush pink dresses. Wedding festivities continued over the weekend, with a laid-back party by the swimming pool and some of the rugby players going snorkelling in nearby caves.