Things got pretty playful on the set of HBO's True Detective this week.

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Actress Rachel McAdams was all smiles as she filmed a scene out in the sunny beach in Malibu on Tuesday. According to the Daily Mail, the 36-year-old actress wore a gray sweater and black sweats as she walked barefoot along the beach.

When she wasn't laughing between takes, McAdams looked rather serious as she looked off into the distance and ran her hand through her short brown hair.

The Emmys Might Have Resolved Future 'True Detective' Confusion 

Based on the actress's exposed bikini straps and wet hair, it looks like her character will be doing some careful thinking after taking swim in the ocean. McAdams will portray Detective Ani Bezzerides on the crime drama this season and could very well be one of the few featured law enforcement agents who hasn't been corrupted by crime.

Written by creator Nic Pizzolatto, the show's upcoming season will follow the murder of a corrupt city manager in California. Season 1's Emmy-winning director Cary Fukunaga will not be returning this year.

The new season will star McAdams, Vince Vaughn (career criminal Frank Semyon), Colin Farrell (Detective Ray Velcoro), and Taylor Kitsch (Officer Paul Woodrugh). Fast and Furious alum Justin Lin will direct the premiere, with three or four other directors stepping in to helm the remaining episodes.

True Detective will return on HBO for a second season mid-2015.