We reveal how to get the enviable physiques of the stars . This week : Scarlett Johansson 's legs . It 's just months since she gave birth to her daughter , but actress Scarlett Johansson was showing off perfect pins on the red carpet recently . Scroll down for video . Preen by Thornton Bregazzi Spring 2015 Collection . Buy looks from the designer at ShopBop.com . Visit site . Scarlett Johansson looked fashion forward and super cool in her Spring 2015 Preen by Thornton Bregazzi little black dress . Her take on the closet classic had a surprising twist with a beaded fringe that felt like a flapper girl 's dream . The fringe detail gave the dress movement , making Scarlett 's sheath seem fun and effervescent . The actress kept the focus on her bold choice of apparel by keeping the rest of her styling to a minimum . She paired her Preen dress with some simple black pumps and stayed jewelry and accessory free . Her swept back pompadour-inspired hair mimicked her youthful and effortless elegance . The overall effect was decidedly grown up and dressy , but with a laid back insouciant vibe . Scarlett 's time spent living in Pairs is clearly rubbing off on her sense of style , shifting her aesthetic towards a more sophisticated , yet whimsical taste . Her Preen dress is not yet available in stores , but it will come with an equally A-list price tag . Considering what a big trend fringe was on the Spring runways , finding an alternate take on this dress should come easily . Take a look through our picks from Mara Hoffman , Milly , Forever 21 and Kate Spade below . Mara Hoffman Neoprene Midi Dress at Revolve ( Now $ 177.00 ) Visit site . Milly Fringe Dress at Revolve ( Now $ 135 ) Visit site . Forever 21 Fringe Sheath Dress . Visit site . Kate Spade Black Sequin Fringe Mini Dress at Nordstrom . Visit site . Scarlett says it can be difficult 'trying to find time to go to the gym ' . But once she 's there , the 30-year-old buckles down . ' I do the same fitness routine as my big muscle-man trainer , ' she says . ' A lot of it is endurance , stability and strength training . ' I like to work up a sweat . I 've tried Pilates and yoga and all that , and I like to dabble in different things . But I always come back to a good old-fashioned athletic , full-body workout . ' What to try : The knee drive with weights . Stand with a dumbbell or bottle of water in each hand , palms facing inwards . Make sure your feet are positioned underneath your hipbones and are facing forwards . Putting your weight on your left leg , bring your right knee up to chest level . Swing the right leg back behind the body into a lunge position , placing the foot on the floor . Then immediately drive the knee forward to chest level again . Keep the weights at your sides as you do this . Repeat 12 to 15 times before switching sides .
New mother Scarlett was showing off perfect pins recently . Actress , Forever 21 , stepped out on the red carpet in a short dress . Likes to work up a sweat doing athletic , full-body workouts .