With England captain Kane standing over the penalty spot, Bellingham walked up to him and whispered in his ear.
The Munich clash also pits two England superstars against each other.
Harry Kane has his eyes set on Robert Lewandowski's record for most Bundesliga goals in a season after scoring twice in a 2-1 victory over Eintracht Frankfurt, but the England striker acknowledges he needs "to get a move on".
The Bavarians, who saw Bayer Leverkusen end their 11-year-Bundesliga reign by securing the league crown two weeks ago, have only the Champions League trophy to fight for with departing coach Thomas Tuchel eager to leave on a high note.
Bayern Munich will meet Real Madrid, who beat holders Manchester City on penalties on Wednesday.
“They are fine and only went to hospital for a routine check-up,” said a spokesperson for the England captain.
The former Tottenham striker enjoyed a prolific record in north London derbies and a summer change of scenery made no difference.
The England captain is however no closer to that elusive first piece of silverware.
Kane is back in north London for the first time since leaving Tottenham last year as Bayern prepare for Tuesday's Champions League quarter-final first leg at Arsenal.
Tottenham Hotspur striker Harry Kane has agreed to move to German champions Bayern Munich after the two clubs reached a preliminary deal for his transfer, Germany's Bild newspaper said on Friday.
Bayern, who did not comment on the reports, have been trying to sign the striker for months with any deal worth around an estimated 100 million euros ($110.19 million)
Brazilian striker Richarlison scored three second-half goals as Tottenham Hotspur came from behind to beat local side Lion City Sailors 5-1 in a pre-season friendly at Singapore's National Stadium on Wednesday.
New Tottenham coach Ange Postecoglou said on Monday Harry Kane was "totally committed" to his vision for the north London club as speculation mounts over the England captain's future.
The German champions are said to be intent on securing the signing of England's record scorer, whose contract with Spurs runs out in 2024
Tottenham Hotspur's Harry Kane is setting an example for others at the club to follow with his "elite mindset", interim manager Ryan Mason said after the striker scored the winner in a 1-0 Premier League victory over Crystal Palace.
Tottenham Hotspur have frequently spoken about the need to tighten up their leaky defence over the last few weeks but striker Harry Kane said it is time to put words into action after they coughed up early goals again on Sunday.
The winger created England's opener for Harry Kane in the comfortable 2-0 victory over Ukraine in Euro 2024 qualifying Group C at Wembley on Sunday, then scored an absolute beauty himself to seal the man-of-the-match award
Newly established as England's record goalscorer, Harry Kane's place in the history books was earned as much by his perseverance as his lethal finishing.
Harry Kane became England's record international goalscorer as his side began their Euro 2024 qualifying campaign by beating reigning champions Italy 2-1 in Group C on Thursday.