Life is rarely one big party — unless, of course, you happen to be a Kardashian-Jenner. Within the span of a week, "America's First Family [1]" has done its fair share of celebrating, first with Kim's "pregnant" birthday [2], then designer Olivier Rousteing's birthday [3], and then Kim once more, with a Troop Beverly Hills-themed baby shower [4]. But if you thought everyone was partied out, think again.

Caitlyn, Kim, and Kylie were spotted grabbing lunch [5] yesterday in honor of Caitlyn's 66th birthday, and naturally, they seemed more than happy to get dolled up. Caitlyn rocked a patterned shirt, complete with a neck scarf and leather pants, while Kim went with her signature bodycon, and Kylie wore a supersexy LBD with beads on the trim.

Read on to see everyone's looks in full and just know the celebrations are far from over: there's still Halloween to get through [6]!

Caitlyn celebrated 66 in style, wearing a printed top with a matching neck scarf, a pair of leather pants — a family favorite [7]! — and a structured black bag.

Kylie couldn't help but go with something sexy, like this Alexander Wang LBD with a beaded trim.

She also posted an Instagram of the statement-making piece.

Kim went with her usual monochromatic look [8], featuring a beige curve-hugging dress and a duster of the same color.

She also posted a selfie of her and Caitlyn, asking if the star was 66 or 1. Apparently that was the debate at dinner!