Khloe Kardashian, 33, 'pregnant with her first child

Khloe Kardashian is pregnant with Tristan Thompson's baby.

The reality star, 33, is said to be 'four months along' with the 26-year-old basketball player's second child, with multiple sources confirming the happy news to UsWeekly, People and TMZ.

Khloe's reported pregnancy makes her the third member of the Kardashian-Jenner family to be expecting a child; younger sister Kylie Jenner, 20, is said to be expecting rapper Travis Scott's baby.Meanwhile, Kim Kardashian, 36, and rapper husband Kanye West, 40, are said to be expecting a baby girl via surrogate in January.

Both Khloe and Kylie are reported to be due to give birth in February.

'They are looking at it like a unifying experience for them as sisters,' a source told People.

Earlier on Tuesday, an insider told People after the news broke that both Khloe and Tristan are 'absolutely thrilled' that they're going to be parents.

'This isn’t something they were in a rush to announce to the whole world, and it’s only been in just the past week or so that they’ve felt comfortable telling most of their inner circle,' the insider explained.

People's source went on: 'This is such a wonderful moment for her: not only is she going to be a mother, she is going to be raising a child with a man she truly loves. Everyone is over the moon for them both.'