Kendall and Kylie Jenner are making the most of their time in Hawaii.

Kim, Kourtney, and Khloe's little sisters relaxed on a blanket together Wednesday afternoon on the island of Kauai.

PHOTOS: Bikini-clad Kardashians on vacation!

Kendall, 16, flaunted her lean frame and mile-long legs in a pink and white string bikini; Kylie, 14, rocked a strappy, mis-matched two-piece.

The reality stars are in Hawaii with their mom Kris Jenner and their father Bruce to celebrate half-brother Brandon Jenner's nuptials to singer Leah Felder.

PHOTOS: The Kardashian family album

The rest of the busy Kardashian krew opted to remain on the mainland; on Tuesday, Kim, 31, arrived back in the states following a trip to the Cannes Film Festival to support her love of two months, Kanye West.

"She wants to be with him as much as possible," a source explained to Us Weekly of her European trip to spend time with her new man. "They really know and love each other."

This article originally appeared on PIC: Bikini-Clad Kendall, Kylie Jenner Go Tanning in Hawaii