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

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."

Hailey and her husband - who tied the knot in 2018 - announced their baby news with a montage on Instagram, which featured the pair renewing their wedding vows in Hawaii.

Among a series of behind-the-scenes snaps, the model was seen wearing a white, lace dress that highlighted her baby bump.

A source previously admitted that the loved-up couple had wanted a child "for a long time".

The insider told 'Entertainment Tonight': "Hailey and Justin are thrilled to be expecting a baby together.

"They have wanted this for a long time and can't wait to expand their family and bring a child into the world."

Hailey and Justin have always had a shared ambition to become parents one day, and they feel that they're now ready to take the "next step" in their relationship.

The source shared: "Hailey and Justin are united and have been on the same page when it comes to parenthood.

"They have experienced so much together as a couple and feel ready to take this next step in their lives and relationship."