The "Age Of Adaline" star showed off her amazing post-baby body (and style!) at a press conference for the film on Sunday and brought sister/"Teen Witch" alum Robyn Lively along for the event.
The new mom wore a tight-fitting black tank, a bold printed peplum skirt and fuchsia sandals. Her 43-year-old big sis wore a gorgeous floral patterned frock that she got from the star's Preserve website.
"Enjoying my sis @robynlively visiting my #AgeOfAdaline press day. Until I realized... That jerk stole our new exclusive dress from @preserve_us !!! THIS is the moment she was caught. Nothing ever changes. I steal her children. She steals my clothes. #FairTrade," she said of the cute Instagram snap.
The star and her siblings are super close, so close that Ryan Reynold's other half named her actress sis the godmother of her daughter!
Although Blake's "Sisterhood Of The Traveling Pants" costar Amber Tamblyn previously revealed that she, America Ferrera and Alexis Bledel were the godmothers to her daughter James, the blonde beauty set the record straight.
"I would call them more fairy godmothers, because I never named them my godmothers," the star revealed in a recent interview with E! News. "They're my dear, dear friends and so I would say my baby has a lot of fairy godmothers."
Turns out Blake takes the guardian role very seriously.
"My sister would be the one to take care of my baby, not those crazy loons," she laughed.
What do you think of Blake's amazing post-baby style? Sound off below then click "Launch Gallery" for more celeb bodies after baby!