‘Saving Mr. Banks’ Actress Victoria Summer Joins ‘Transformers 4’

Michael Bay returns as director of the Paramount sequel starring Mark Wahlberg

British actress Victoria Summer has landed a role in Michael Bay's "Transformers 4," the actress announced on Twitter earlier this week.

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Summer's role is being kept under wraps, though she was initially hired to work for three days and will be now be on set for three weeks.

Ehren Kruger wrote the script, and Lorenzo di Bonaventura is producing with Don Murphy, Ian Bryce and Tom DeSanto.

Summer, who plays "Mary Poppins" star Julie Andrews in Disney's "Saving Mr. Banks," recently starred in the indie movie "How Sweet It Is" with Erika Christensen and Paul Sorvino.