The Bhoys chief executive is proud of the 'fantastic achievement.'
And the 'fantastic achievement' is a sign of how well supported the Bhoys are, Lawwell says.
Indeed, the Celtic chief has praised and thanked fans for sticking by the Scottish champions despite times not being 'easy.'
During times of change, the Hoops faithful have been 'magnificent,' according to Lawwell, and he was full of praise for the supporters after Celtic won their fourth Scottish Premiership title in a row.
The Bhoys' title was confirmed on Saturday afternoon when second-placed Aberdeen lost at Dundee United. The trophy completes a league and cup double during Ronny Deila's first season in charge at Parkhead.
Lawwell said: “Times are not easy and they’ve stuck by us. At the moment we’ve still got the third-highest season book numbers in the UK, after Manchester United and Arsenal, and what a fantastic achievement that is.
“So the supporters over the past number of years have been magnificent, particularly over the past two or three years. They’ve stuck by us. We have had transition, we have had change and I’d like to thank every one of them. They’ve been absolutely magnificent.”
Celtic will now prioritise Champions League qualification next season, although their aims will also naturally veer towards a fifth league title in a row, as well as something the club haven't achieved since 2001: the domestic treble.
With such a large fanbase, the Bhoys can really look to kick on in the next few years.