Reese Witherspoon took a trip down memory lane on Sunday as she reminisced about her first ever photo shoot with Seventeen Magazine.SEE: Reese Witherspoon splashes out $28million on FOUR new homesTaking to Instagram, the Legally Blonde actress shared a never-before-seen throwback snap of herself posing at the beach alongside her co-star, Emily Warfield.WATCH: Reese Witherspoon fails to keep up in hysterical home workout videoThe 15-year-old teen actress could be seen wearing a blue baseball cap, skinny jeans and an oatmeal knitted jumper.LOOK: Reese Witherspoon's favourite red lipstick is in the Amazon saleSEE: Reese Witherspoon shares insight into relationship with daughter Ava with new photosBursting with nostalgia, Reese captioned her post: "Throwback to my very first photo shoot ever for Seventeen magazine. I can't believe I found this photo.