Hailey and Justin Bieber are already "very protective" of their baby.

The 27-year-old model and Justin, 30, recently announced that they're expecting their first child together, and a source has now revealed why the couple opted to keep the news quiet for so long.

The insider told PEOPLE: "When they found out that Hailey was pregnant, it was just the best day for them. They have both been very emotional about it.

"They feel so blessed. They've also felt very protective of the baby from the moment they found out."

The loved-up couple shared the news with their friends and family before they announced the news to their fans.

The source said: "They shared with family and close friends early on. It was important for them to keep it quiet and just enjoy for as long as possible before they publicly confirmed though.

"They asked their friends to not share until they were ready to announce."

Justin and Hailey announced their pregnancy news via Instagram on Thursday (09.05.24).

A source subsequently revealed that they're "thrilled" to be expecting their first child.

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."