Rosamund Pike and David Tennant had a ''bonding day'' at a theme park.

The 'What We Did On Our Holiday' stars were joined by their young co-stars Emilia Jones, 12, Bobby Smalldridge, nine, and six-year-old Harriet Turnbull at Chessington World of Adventures in Surrey, South England, and though they had a ''lovely'' day, it wasn't as fun as it could have been because the former 'Doctor Who' star kept getting mobbed by fans.

Rosamund said: ''We had a lovely, but quite difficult day.''

However, the 35-year-old actress believed the trip was worthwhile because it helped when shooting the movie, which follows a divorcing couple who travel with their children from London to Scotland to celebrate the kids' grandfather's birthday.

She said: ''I really believed in us as a family -- I believed in the five of us.''

And the on-screen family were sad when filming in Scotland came to an end.

She told the Daily Mail newspaper: ''We made the grounds of that house our own, and had our base camp there. We had a sitting room where we'd read the papers, watch YouTube, muck around with the children. We'd go for dinner in the evenings.

''Everybody was tearful when it became time to go and I think it was a really profound experience for those children. Harriet, the little one, had never done any filming before, and Bobby and Emilia were lovely, too.''