Reese Witherspoon Adorably Rocks Out to 'Sweet Home Alabama' -- See the Video!

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Reese Witherspoon might be an A-list actress and producer, but she’s still a country girl at heart!

The 40-year-old starlet proved she hasn’t forgotten her rom-com roots on Sunday, posting an Instagram video rocking out to Lynyrd Skynyrd’s “Sweet Home Alabama,” with the caption, “When your song comes on at a red light.”

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The song is clearly near and dear to Witherspoon, who starred alongside Patrick Dempsey and Josh Lucas in the iconic 2002 romantic comedy of the same name.

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The clip is certainly a change in energy from the carpool pic the mother of three posted earlier in the week, sharing a selfie as her “happy napper,” 3-year-old son Tennessee, snoozed in the backseat.

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Earlier this year, Witherspoon celebrated her 40th birthday with a private concert from Taylor Swift, which also included a “Sweet Home Alabama” singalong with Keith Urban on the guitar!

See more details on the epic birthday bash in the video below!

WATCH: Reese Witherspoon Celebrates Her 40th Birthday With a Private Concert From Taylor Swift