Breathtaking Beckham!

On Friday, fourth-time mom Victoria Beckham came out of hiding -- fabulously!

Just under two months after giving birth, the fashion-designer, 37, went shopping with soccer-star husband David, who cradled their baby daughter Harper Seven.

For one of her first photographed outings post-baby, Victoria stunned in tight leather pants, a black tank top, signature shades...and towering, red-soled Louboutin heels.

According to an insider close to the star, the svelte fashionista is already back to a UK size 4, a.k.a. a U.S. size 0.

The former Spice Girl has also evidently recovered from a painful slipped disk that put her somewhat out of commission in late August. She told fans via Twitter: "I'm feeling much better and enjoying every precious minute with baby Harper. I'm so in love."

Born July 10, Harper Seven is the fourth child and the first daughter for Victoria and David, 36, who share sons Brooklyn, 12, Romeo, 8, and Cruz, 6.