Amber Heard takes the plunge in backless, cleavage-baring maxi dress as she joins Magic Mike XXL castmates on canal boat in Amsterdam

The cast of Magic Mike XXL have been on the move all week promoting their new movie.But Amber Heard, 29, looked as radiant as ever when she stepped out in Amsterdam on Wednesday for the latest leg of their promo tour.Fresh from the film's UK premiere in London on Tuesday evening, The Rum Diary actress wore a plunging, backless gown for their group trip out on a canal boat in the Dutch capital.

She teamed the cream, lace dress with several necklaces which only accentuated her never-ending neckline.Johnny Depp's new wife wore dewy make-up and wore her hair pinned up as she brandished the her huge rock on her ring finger.

Joining her for the boat ride was the rest of the movie's core cast, including Channing Tatum, Matt Bomer, Joe Manganiello, Kevin Nash, Adam Rodriguez and Jada Pinkett Smith.Nestled between Adam and Channing, the blonde beauty looked simply stunning as they did a group interview on the water.

Jada also went all out for the boat ride, slipping in to a red full-length gown complete with thigh-high split, while the men dressed down for their outing.Channing looked particularly casual in a plain white T-shirt, chinos and casual boots. He teamed his laid-back look with a pair of mirrored aviators and a fedora hat.And while the Step Up actor looked handsome, it was clear to see that he's no longer hiding a six-pack underneath his shirt.

By Emily Hewett For Mailonline

Published: 20:34 GMT, 1 July 2015 | Updated: 23:31 GMT, 1 July 2015, Read more: http://www.dailymail.co.uk