The potential of a powerful Belgian striker was bought into by the Blues following the appointment of the Portuguese coach who was meant to follow in the footsteps of Jose Mourinho.
Lukaku played just 12 senior matches for Chelsea that season, after playing regularly the campaign before at Anderlecht in Belgium.
Villas-Boas was sacked in March 2012 following a poor run of form in the Premier League, with former player Roberto Di Matteo taking over as interim manager for the remainder of the campaign.
Villas-Boas wasn't interested, though, and is instead weighing up what to do about his future at the Ligue 1 club.
Lukaku told Het Laatste Nieuws: "Di Matteo told me I would stay with the group until after the final". He knew that finances would be tight, but was happy knowing that he would be continuing to work with the Spaniard and with a squad that he has strong affection for, in the Champions' League.
"This win is one of the things I've always dreamed about".
Lukaku said he was grateful to be included during team celebrations, but he refused to hold the Champions League trophy as he was not in the squad in the first place.
"That is nice in itself at the age of 19". I will never forgive him for that. You don't develop that way.
Do you think Lukaku deserved to play more for the London club that season?
"The previous trainer (Villas-Boas), I will never forgive him".
"(Roberto) Di Matteo approached me completely differently, he immediately involved me in everything. That should have been much earlier. "I will never forgive him for that".
However, the Belgian striker struggled to break into the first team under Villas-Boas and was confined to the substitutes' bench for the majority of his first season in west London.
And Chelsea famously went on to lift their first-ever Champions League trophy after defeating Bayern Munich on penalties in the German side's own stadium months later. 'Because I didn't win this trophy myself. Only if you have contributed to a cup or a title yourself, you can also show it off'.
Following a successful loan spell at Goodison Park, Everton snapped up Lukaku in the summer of 2014, for a fee in the region of £28 million.