The 22-year-old was part of the side that beat Denmark 2-1 at Wembley to secure a place in the final against Italy on Sunday.
As Rice helped his side to victory, his brother’s partner was in labour. So he only learnt about the joyous news after the final whistle.
The West Harm star later revealed that his niece had been born as Harry Kane scored the winning goal in extra-time.
Speaking to BBC Sport after the game, a delighted Rice said: ‘My brother has literally had a baby, as the second goal went in.
‘He’s crying his eyes out, he’s had a little girl. It’s a special night all round!’
It was double delight for England star Declan Rice last night, as the Three Lions midfielder became a Euro 2020 finalist… and an uncle
Last night the West Ham star revealed that his brother’s partner had given birth as Harry Kane scored the winning goal in extra time. Pictured: Declan Rice has previously posted pictures of his brothers on his Instagram
Speaking about the win, he added: ‘A first final since 1966. I so want to do it for the people at home. Seeing the reactions – I’m a fan as well.
‘I wish I was with them cheering, we’ve not won anything yet. Italy are a top side but we’re ready.’
It comes as England’s footballers ended their 55-year wait for a major final last night – and are just 90 minutes from Euro 2020 glory after a nerve-shredding extra-time win over Denmark at Wembley.
More than 66,000 people – joined by Prince William, Boris Johnson and a who’s who of celebrities – packed the stands in Britain’s biggest post-pandemic crowd.
And those fans played a crucial role as they roared their Three Lions heroes home – the 2-1 semi-final win coming by way of a Harry Kane goal in extra time.
Gareth Southgate’s man now face Italy on Sunday. England won a controversial penalty for a trip on Raheem Sterling and though captain Kane saw his effort saved by Danish keeper Kasper Schmeichel the striker was first to pounce on the rebound, slamming the ball home and sending fans into dreamland.
England are one game from glory, as they now face a final with Italy at Wembley on Sunday after beating Denmark 2-1 last night
Kane celebrates with team mates after scoring their side’s second goal during the UEFA Euro 2020 match
Twenty tension-filled minutes later, the final whistle sounded and Wembley – and millions watching at home – burst into a national chorus of Neil Diamond’s Sweet Caroline, with the PM and wife Carrie among those joining in.
It sets up that final against Italy, back at Wembley on Sunday evening. But for the fans, last night was all about ending the decades-long wait for a first final since the 1966 World Cup.
As the victory was confirmed, shirtless fans packed into London’s Trafalgar Square fan zone sprayed beer over each other, singing ‘It’s Coming Home’ and praising manager Gareth Southgate’s team.
Vic Richards, 22, from Croydon, south London, said: ‘I’m still trying to compute what happened, I’ve never seen England make a final.
‘It’s beautiful, it’s unbelievable, I love this country, the players gave it their all. This is an historic occasion, we may never see this again – now we can start to believe.’
Other fans collapsed onto the ground crying with joy or partied on the tables. Oliver Ways, 28, from Mitcham, said: ‘This time it’s coming home, the momentum is with us, I don’t care what anyone says. I’m so drunk but I don’t care – the game was just how we wanted it.
‘I can’t believe I’m saying this but England are in a final!’
England manager Gareth Southgate celebrates after England beat Denmark in the Euro 2020 semi-final at Wembley
The Duke of Cambridge in the stands during the UEFA Euro 2020 semi-final match at Wembley Stadium
England fans soaked up the atmosphere at Box Park in Croydon last night as England beat Denmark to reach the Euro 2020 final
The atmosphere inside and outside the ground had been rousing and good-natured. England players took the knee before kick-off in support of anti-racism, but no boos could be heard. ITV commentators described the ‘buzz’ and ‘sense of occasion’ which could be felt in the massive stadium.
Pubs across Britain had been packed out for the match, with 6.8million pints expected to be poured, and fans spilled out onto the streets after the final whistle. In London around 20 people were arrested.
Fans blocked roads and clambered over a stranded bus in jubilant scenes before being moved on by police to continue their celebrations.
As the result sank in, Prince William, the FA president, led the congratulations. The Duke had cheered England on alongside wife Kate and son Prince George last week but was forced to watch yesterday’s game alone as the Duchess was isolating after a covid Test-and Trace alert.
But in a tweet from the KensingtonRoyal Twitter account, the couple said: ‘What a game, what a result! A huge team effort @England. The whole country will be behind you on Sunday. #ItsComingHome.’
Mr Johnson wrote on Twitter after the game: ‘Tonight @England played their hearts out. What a fantastic performance from Gareth Southgate’s squad. Now to the final. Let’s bring it home.’
Also congratulating the England victory, Labour leader Sir Keir Starmer tweeted a picture of himself celebrating as he watched the semi-final match on TV, with the hashtag: ‘#ItsComingHome’.