Justin and Hailey Bieber committed to being 'the best parents possible'

Justin and Hailey Bieber are committed to being "the best parents possible".

The 30-year-old pop star and Hailey, 27, are preparing to become parents for the first time, and they're both looking forward to the challenge.

A source told PEOPLE: "They're ready to become parents. They're planning for the baby's arrival and it's very cute.

"They are super committed to their marriage, but also to being the best parents possible."

Justin and Hailey have been able to support each other through the process.

The insider explained: "Hailey has always been very supportive of Justin. She's his rock. She is patient and someone he can always lean on."

Hailey is also supporting Justin as he figures out his next career moves.

Another source said: "She's very involved and helps him make decisions."