Robert Pattinson already wants MORE children with Suki Waterhouse just weeks after welcoming first baby together - as insiders reveal how 'joy' of becoming a dad has changed the Twilight star

He only recently welcomed his first child - but Robert Pattinson is clearly unfazed by the demands of parenting, with insiders claiming he is already keen to expand his brood with his fiancée Suki Waterhouse.

The smitten Twilight actor, 37, and the model, 32, confirmed they had become a family of three when they were pictured on a stroll in LA last week.

Robert is said to be so besotted by his new bundle of joy and how his wife-to-be has been coping that he is reportedly angling to work on baby number two Suki feels ready.

'Rob has taken to fatherhood the same way he has taken his film roles, with complete seriousness and joy,' an insider told DailyMail.com exclusively.

'He didn't know what it would be like but it's just blowing his mind. And to see how Suki has adapted and changed this soon since the birth has warmed his heart in a way that is unexplainable.'

They continued: 'Rob wants more children, and once Suki has the same idea, he is keen to try for another as soon as she is ready.

'They are having a really fun time being parents and it feels like second nature to them.'

DailyMail.com has contacted representatives for the couple for comment. 

Robert and Suki first signaled the arrival of their little one last week when photos obtained exclusively by DailyMail.com showed them out in LA pushing a stroller.

They were joined by Suki's mother Elizabeth on the walk who wore a bright pink jumper. 

On Thursday, Suki shared a photo of herself cradling her swaddled newborn while standing in front of a window outdoors.

'Welcome to the world angel,' she wrote alongside a red heart emoji.

The Hollywood couple, who were first linked in 2018, have retained a level of privacy.

But Suki went public with her pregnancy at the Corona Capital Festival in Mexico City in November, where she showed off her burgeoning baby bump underneath a purple mini dress on stage.

'I thought I'd wear something sparkly today to distract you from something else I've got going on,' the singer said while pushing back her outer layer to motion towards her stomach.

After loud cheering from the crowd, she teased: 'I'm not sure if it's working.'

She then let her growing bump take center stage at the Emmy Awards in January when she modelled a backless red Valentino gown.

It came a month after the Daisy Jones and the Six actress seemingly confirmed her engagement to Robert when she was pictured wearing a Toi et Moi ring during a stroll in London.

A source recently confirmed the news to People.

While Robert, who famously likes to keep his personal life private, has kept quiet about their relationship, Suki talked openly about the actor during an interview with The Times earlier this year.

Speaking to the publication, she admitted she is 'shocked' that she is still 'so happy' after nearly five years - and revealed Robert still gives her butterflies.

'I'm always incredibly excited when I see his name pop up [on my phone] or even a text, and I think he feels the same about me,' she said.

'We've always got so much to say, and I find him hilarious.'