Mandy Moore has had 'the best week ever' with newborn son August... seven days after welcoming first child with husband Taylor Goldsmith

She gave birth seven days ago.

And Mandy Moore celebrated a week with her newborn son August Harrison on her Instagram page this Saturday.

The 36-year-old shared a picture of her baby with his face carefully kept out of frame and wrote: 'One week earthside. The best week ever.'

In recent years she has been starring on the tearjerker TV show This Is Us and joked in the caption of her new baby picture: '#thisisgus.'

Mandy shares her baby with Dawes frontman Taylor Goldsmith whom she married at a sunset wedding in her backyard in 2018. 

She broke the news of her pregnancy in September with an Instagram snap of herself and her husband caressing her bump. 

'Baby Boy Goldsmith coming early 2021,' the This Is Us actress revealed to her more than four million Instagram followers.

Mandy gave birth last Saturday and has since revealed on Instagram how she and her husband decided to name the baby August.

'It was last August when @taylordawesgoldsmith and I found out we were having a boy (it’s also Taylor’s birth month) and we always loved the name... so it was settled very early on in our book,' Mandy dished.

The caption was accompanied by a picture of a little grey baby blanket with the words 'AUGUST' stitched onto it.

'Then for our anniversary in November, T gifted me with this blanket with the “A” (for Amanda) made from extra material from my wedding dress and “T” (for Taylor) from his wedding shirt. Felt like a very fitting amalgamation of our whole story. I can’t wait to pass this on to our sweet August one day,' Mandy shared.

Late last month she spoke candidly about the anxiety she felt finding out that she was pregnant while having endometriosis.

'Because of this issue with my uterus, I was very hesitant to believe it and put any stock in it,' she told Romper. 'I sort of was holding my breath until 12 weeks.'