The World Cup hit the pause button on Wednesday as the eight remaining teams geared up for the quarter-finals after England became the final side to qualify following a penalty shootout win against Colombia.
Dier was the man who scored the dramatic victor after England goalkeeper Jordan Pickford had earlier stopped Carlos Bacca's strike.
England now face Sweden in the quarter-finals in Samara at 3pm United Kingdom time on Saturday.
England were pegged back 1-1 late on in Moscow, before coming out on top on penalties to set up Saturday's meeting with Sweden for a place in the final four. The celebrations, however, did not end in the field as Southgate and his boys took to social media to express their delight.
And, going by social media, everyone in England is convinced that IT is finally coming home.
"I know they weren't happy before this match because there were lots of remarks - many unfounded comments - so I don't think this is fair", he said.
Jos Buttler posted a clip on Instagram, which shows players jumping around in a huddle after the final kick, with a few of donning the national team's jerseys.
England have beaten Colombia on penalties.
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Jorge "Koke" Resurreccion and Iago Aspas eventually missed their shots and Russian Federation prevailed. Pique has been a controversial figure in the Spain set-up in recent years.
"A new England" - Pickford's save in the shootout is the headline image of the I's back page, along with the caption: "Pickford's great save and Dier's cool head see Three Lions past Colombia in fret-ever World Cup shootout victory".
Baddiel & Skinner proved that time hasn't changed much after sharing a snap of themselves celebrating England's win after watching the match together.
He added: "You obviously fear the worst when you miss the penalty but Pickers [Pickford] has done brilliantly with the save so [I'm] just relieved that we got over the line".
"We then had to keep our discipline several times, which was outstanding".
"They're an outstanding football team and an outstanding symbol of England".
Eric Dier is mobbed by Gareth Southgate's "roaring" lions. "He made some fantastic saves in the game".
"So that is a big question for me, whether they'll be able to open us up if we press them higher, and what would be the effects on our own game".