EXCLUSIVE - Sofia Richie treated to a six-tier cake during her fun-filled 21st birthday (photos)

She was treated to a whopping $250,000 Aston Martin from her beloved beau for her 21st birthday on Saturday.

And Sofia Richie kept the good times rolling as she let her hair down for her big day alongside boyfriend Scott Disick at XS nightclub in Wynn Las Vegas later that day.

The model ensured she was the centre of attention as she highlighted her killer physique in a clingy pink catsuit, embellished with eye-catching sequins throughout.

Sofia appeared happier than ever before as she boogied with her nearest and dearest at the venue. Throughout the evening, she knocked back alcohol to celebrate her first legal drink since turning 21.