Hilary Duff is in no hurry to marry her boyfriend Matthew Koma

Singer-actress Hilary Duff is reportedly fast approaching the last leg of her pregnancy but is in "no rush" to marry her boyfriend and musician Matthew Koma.

The two will welcome their first child together soon.

Despite rumors that Koma had popped the question, a source told eonline.com that the pair is not engaged and in "no rush to get married".

"They already feel married and don't feel they need a signed document to seal the deal," said the source.

"They eventually do want to get married and have a ceremony but for now, are focused on their baby girl coming."

The source describes the couple as a "true modern family", adding that Koma is a "great stepdad" to Luca Comrie -- Hilary's six-year-old son.

"Everyone gets along great and it has been a smooth transition," the source added.

"Luca has been overly excited since day one of this pregnancy and is starting to understand more of what is about to come. He is very anxious for his baby sister to come and is always talking about her."