The Belgian has admitted that he cried when the Scot was sacked by Manchester United.
The Scot was sacked before the end of last season after a dismal spell in charge at Old Trafford, with United having failed to reach the Champions League, never mind challenge for the Premier League title.
Fellaini himself endured a difficult first season after his move from Everton, having become the scapegoat for United’s troubled spell under Moyes.
Now, the Belgium international midfielder has admitted that he cried when his former boss, who he had also worked under at Goodison Park, was sacked.
"When he left I was sad," the United midfielder said. "There were tears. This is normal. I am a human being.
"I worked with him for six years. I arrived the next day at the (training ground) canteen, and I saw him in his suit, rather than his tracksuit. I told myself: 'This is the end.'"
Similar to Moyes, Fellaini struggled to make the step-up to United from Everton, with the increased pressure something both men failed to adapt to.
The Belgian failed to score a single goal in his first season, but he has since come back stronger during this campaign under new manager Louis van Gaal, becoming a key a part of the squad.
The 27-year-old was more than aware of this scapegoat aura hanging around him, though, realising that he had nothing to lose when Dutchman Van Gaal came in.
"During my first season at Manchester, the team was not performing and I was the scapegoat," he added.
“I knew it was going to be difficult when he (Van Gaal) arrived because I was the scapegoat last season. So I told myself I had nothing to lose. After a few training sessions, I felt things were going well.”