Now Tottenham are pressing and have a couple of chances in quick succession. 

First, Harry Winks attempts to bend a shot towards the far corner but om King pushes away, before the Millwall keeper holds Son Heung-min's low strike at the near post.

Millwall have gone old school this season with the big and small strike partnership. 

Their front two have been superb with Steve Morison bagging 15 goals and Lee Gregory 14.

The two almost combine early doors as Gregory flicks on a forward pass, but the balls runs through to Michel Vorm.

Image source, Reuters

Danny Murphy
Former England midfielder on BBC One

If you go 17 games unbeaten like Millwall have then you deserve to be here. They are great defensively, have had a string of clean sheets. 

They will give Tottenham a game I'm sure. 

Image source, AFP

One last roar of "Come on you Spurs" by the home faithful and Millwall get this tie under way.

Millwall players are all smiles as they give each other hugs and high fives before kick-off.

If they are nervous, they don't look it. In fact, they look completely up for this one.

Image source, AFP

Alan Shearer
Premier League record goal scorer

Look at Harry Kane, he can score almost any goal - headers, left foot, right foot. 

When you get to this stage of your career, you often have to face two defenders, and that's a sign of a great player. He is a marked man. 

People have been talking about him as the top player and he will love that attention. 

The players are in the tunnel. The atmosphere is electric. 

Here's a quick a reminder of the line-ups.

Tottenham Hotspur: Vorm, Dier, Alderweireld, Vertonghen, Trippier, Wanyama, Winks, Davies, Son, Alli, Kane. Subs: Lloris, Walker, Janssen, Sissoko, Eriksen, Onomah, Wimmer. 

Millwall: King, Cummings, Cooper, Webster, Craig, O'Brien, Thompson, Williams, Wallace, Gregory, Morison. Subs: Hutchinson, Worrall, Onyedinma, Romeo, Butcher, Ferguson, Girling. 

Referee: Martin Atkinson (W Yorkshire)

BBC One

Tottenham manager Mauricio Pochettino, speaking on BBC One: "It is a massive game for us. We are one game from Wembley."

On whether Harry Kane can beat Alan Shearer's Premier League goal record : "It will be difficult for Harry. He would have to be amazing and score 20 goals every season for the next 10 years. It will be tough for him."

Image source, .

Celtic drop points for only the second time this season but they are just two wins away from winning the title.

Teddy Sheringham
Former Millwall and Tottenham striker

The Millwall unity will come together today. No one likes them and they know that - they will have some fun with that. 

Image source, AFP

BBC One

Former Millwall and Tottenham striker Teddy Sheringham, speaking on BBC One: "Millwall are on a 17-game unbeaten run. They have got a rigid 4-4-2 formation.

Former Tottenham midfielder Jermaine Jenas: "Tottenham have been absolutely sensational at White Hart Lane. Since they were knocked out of the FA Cup there has been a shift in Mauricio Pochettino's focus in wanting to win a trophy."

Image source, .

Millwall have conceded just one goal in their previous 10 games.

Incredible.

Alan Shearer
Ex-England striker on BBC One

Image source, Getty Images

Millwall are the only team in the top four leagues who have not been beaten in 2017 so it's going to be difficult for Tottenham. I think Spurs will be up for it. It's the last cup tie at this ground. They've not won the FA Cup since 1991 so it could be a big season for them.

Jermaine Jenas
Former England midfielder on BBC One

Spurs have been sensational at home this season. 

They are playing with such confidence, it could be a very tough afternoon for Millwall. 

I genuinely cannot believe this was 13 years ago, but Millwall famously reached the FA Cup final back in 2004. 

They were beaten by Manchester United 3-0 at Cardiff's Millenium Stadium. 

Current Lions boss Neil Harris started that game and had scored the winner against Tranmere in the quarter-finals. 

If anyone knows how to pull off an FA Cup upset...

Image source, .

BBC One

Strong line-up in the Match of the Day studio today. Plenty of goals in there. 

Gary Lineker is joined by Alan Shearer, Teddy Sheringham and Jermaine Jenas for build up to Tottenham versus Millwall.

It's on BBC One and online in two minutes. Enough time to brew up.

Image source, Getty Images

Mikey: Andy Booth at Spurs  

Mikey, as a Huddersfield Town fan, I will not hear a bad word about Sir Andy of Boothshire. 

Legend.

Leon Osman
Ex-Everton & England midfielder on MOTD2 Extra

You look at Spurs and how well they have developed under Mauricio Pochettino - they almost won the Premier League last season - but I think they really need their first bit of silverware to kick the team on. 

Look at Jose Mourinho's attitude at Manchester United. He got there and was determined to get his first trophy to spark something. 

That's what Spurs need to do. 

Gary Lineker: Probably the last time I'll be at this wonderful old place. Great memories.