Liv Tyler says her pregnancy is "amazing" and "fun".

Liv Tyler

Liv Tyler

The 38-year-old actress is expecting her third child, her second with fiancé Dave Gardner, and has looked stunning in a series of stylish maternity outfits on the red carpet.

And while many women find they struggle as they carry a child, Liv is embracing every second of the process.

She told E! News: "It's amazing. It's so fun. I feel very grateful."

Liv is already mother to 11-year-old Milo with ex-husband Royston Langdon, and 11-month-old Sailor, whose father is Dave.

As her family expands, Liv admits she is more than thrilled to see how Milo has taken to being an older sibling.

She added: "They're so sweet. It's so fun. My older boy is 11 and it's so sweet to see him with Sailor because there's a big age difference and he just absolutely adores him so much."

Liv also hinted that she and Dave know the sex of their baby, but won't be making the announcement anytime soon.

The stunning brunette announced her pregnancy by posting a picture of her growing bump on January 8, alongside the caption: "Oh my goodness it seems the stork is visiting us again!!!! I am growing another little Tyler Gardner in my belly. our family is growing!!! So grateful. @davidgardner i love you (sic)."