Post Malone is planning Justin Bieber's ''nice little'' bachelor party.

The 'Sorry' hitmaker is currently engaged to 21-year-old model Hailey Baldwin, and although it was recently claimed they're not in any rush to tie the knot, rapper Post Malone has revealed he is in charge of planning the party for Justin that will mark the end of his single days.

Speaking to The Blast, the 23-year-old 'Rockstar' hitmaker said: ''He just asked me to do his f***ing ... We're gonna have a nice little f***ing party and we're gonna have a great time. It's gonna be fun. We're gonna do some fishing, we're gonna do some hanging out.''

Post's comments come after the 24-year-old musician and his fiancée are said to be ''enjoying the ride'' that comes with their engagement, and aren't in any hurry to walk down the aisle just yet.

An insider said: ''The couple have talked to a lot of people close to them, and are listening to the constant advice they've been receiving to 'enjoy the ride.' [They are] in a loving relationship and are working on the foundation now to maintain the forever.''

Whilst another source claimed the pair - who got engaged a month ago just weeks after they rekindled their romance following a 2016 fling - are ''waiting until sometime next year to tie the knot'' because they feel they've ''made the commitment, and that's the most important thing.''

Justin proposed to Hailey during a trip to the Bahamas last month, and later confirmed the news on Instagram in a sweet tribute post dedicated to the blonde beauty.

The 'Love Yourself' singer wrote: ''Was gonna wait a while to say anything but word travels fast, listen plain and simple Hailey I am soooo in love with everything about you! So committed to spending my life getting to know every single part of you loving you patiently and kindLY. I promise to lead our family with honor and integrity letting Jesus through his Holy Spirit guide us in everything we do and every decision we make. My heart is COMPLETELY and FULLY YOURS and I will ALWAYS put you first! You are the love of my life Hailey Baldwin and I wouldn't want to spend it with anybody else. You make me so much better and we compliment eachother so well!! Can't wait for the best season of life yet!. (sic)''