The actor, who famously dated actress Elizabeth Hurley for 13 years before splitting in 2000, will be a dad of four with two partners - Swedish television producer Anna Eberstein, and Chinese restaurant receptionist Tinglan Hong.
Hugh has two children from his previous relationship with Tinglan Hong. The ex-couple welcomed a daughter - and Hugh's first child - in September 2011. The little girl's name is Tabitha Jīng Xǐ (which means 'happy surprise' in Chinese).
A year later, in September 2012, Hugh had a son, John, with his current girlfriend Anna. The Bridget Jones actor then got back together with Tinglan and the pair welcomed a son, Hugh's third child, Felix in 2013. And it seems Hugh is now back with Anna, as the pair have been spotted together multiple times over the summer.
In May, the couple attended the French Open in Paris and were later seen watching the Wimbledon Men's Final in July. According to Hello! magazine, Anna was pictured with a 'substantial bump' earlier this month, leading to reports that she is pregnant with the 55-year-old actor's fourth child.
Hugh was pictured with Swedish producer Anna over the summer. The couple are now set to welcome their second child together.
Speaking to Swedish newspaper Nöjesbladet last September, before their reconciliation, Grant said of Eberstein: 'We are very good friends and she's a very good mother.
'[I see my son] all the time, all the time - most days', adding that his relationship with son John was 'excellent' and 'I love him very much'.
Although Hugh is notoriously private when it comes to his personal life, he has opened up about fatherhood has changed him. He told US Weekly: 'It's made me much nicer.'
'One of my kids is very obsessed with saying goodbye - he's only two – to everyone, including the man who delivers the groceries, whoever he might be. He has to have a hug and a kiss, and I find that very charming.'