Rangers’ 1-0 win in Eindhoven against PSV secured a 3-2 aggregate triumph for Giovanni van Bronckhorst’s men and the riches of reaching the next stage of the competition.
Celtic, as Scottish champions, had already booked their spot in the group stages by winning the cinch Premiership last season.
Now that all of the play-off ties have been played, we know all 32 clubs remaining in the competition.
Real Madrid won the tournament last year and are among a number of star-studded teams waiting to find out who they will face, starting next month.
Here are all the details you need to know ...
How many teams are in the Champions League?
There will be 32 teams in total, split into eight groups of four.
When is the Champions League group-stage draw?
The draw is scheduled for Thursday, August 26 in Istanbul, Turkey. The ceremony begins at 5pm BST.
Is the draw on TV?
The draw will be shown live on BT Sport’s channels in the UK.
Who is in pot 1?
Real Madrid, Eintracht Frankfurt, Manchester City, AC Milan, Bayern Munich, PSG, Porto, Ajax.
Who is in pot 2?
Liverpool, Chelsea, Barcelona, Juventus, Atletico Madrid, Sevilla, RB Leipzig, Tottenham Hotspur.
Who is in pot 3?
Borussia Dortmund, Red Bull Salzburg, Shakhtar Donetsk, Internazionale, Napoli, Benfica, Sporting CP, Bayer Leverkusen.
Who is in pot 4?
Marseille, Club Brugge, Celtic, Viktoria Plzen, Rangers, Dinamo Zagreb, Maccabi Haifa, FC Copenhagen.
What are the fixtures dates?
The gameweeks are as follows: September 6-7, September 13-14, October 4-5, October 11-12, October 25-26, November 1-2.
When are the Europa League and Europa Conference League draws?
These draws both take place on Friday, with the Europa League draw starting at 11am BST and the Europa Conference League at 1.30pm BST. Hearts are guaranteed to be in at least the Conference League group stages and will be in the Europa League should the overcome a 2-1 deficit against Zurich on Thursday.