Victoria Beckham during early morning workout.

Victoria Beckham, 45, opted for sporty attire, flashing a glimpse of her lithe frame in gym-wear for sizzling Instagram snaps. The mother-of-four slipped into a white sports bra and skin-tight leggings during an early morning workout with personal trainer Tracy Anderson.

Looking good: On Thursday morning, Victoria Beckham flashed a glimpse of her lithe frame in gym-wear for post TAM workout.

She captioned the snaps: "Early morning workout. @tracyandersonmethod Sharing my top fitness and wellness tips for the holiday on #worldofVB this week xx VB."

See all the VB mirror selfies below.