Actress Samantha Ruth Prabhu, who impressed audiences with her moves in 'Oo Antava' from the Allu Arjun-starrer 'Pushpa: The Rise', is currently busy prepping for her upcoming project, 'Citadel'. A source close to the actress revealed that "Samantha has been working on getting into her character for Citadel in the US. She is following a very strict fitness and lifestyle regime there to get into the physicality of her character in the series."

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