Who knew that under that stammering diffidence and the struggle to remove Bridget Jones's big pants was beating such a passionate and courageous heart? Grant took Question Time by storm last week in a way I don't think I've ever seen - even looking in the mirror.
He slaughtered the sacrificial lamb the Government had put up to defend their treacherous pusillanimity over the News of the World, and the guttersnipe Sun columnist Jon Gaunt he swatted away like the sewer-fly he is.
He pierced the hypocritical bubble being blown by short-trousered Krankie wee Douglas Alexander - to my astonishment now the shadow Foreign Secretary - by the simple act of reminding the audience that the schoolboy hyperventilating before us was at Rupert Murdoch's private party just a fortnight before.
Together with the noble Shirley Williams - and what a loss to Labour she is - Grant really was the very best of British.
In the most manly sense of course for me, writing this in Notting Hill, it was Love, Actually.
I've invited Grant and Steve Coogan, aka Alan Partridge, another unlikely excoriating critic of the dirty digger, together with courageous MP Tom Watson, legal eagles such as Mike Mansfield QC and writers John Pilger, Matthew Norman and Mark Steel to a meeting this week to launch a campaign for a new, fair media in this country.
I expect it will attract a lot of attention. These events and the forthcoming judge-led public inquiries mean the media kaleidoscope has been seismically shaken. The pieces are in flux and, before they settle again, the decent civilised majority in these islands must work out what kind of media they think we deserve.
The top-line demands are obvious and urgent. There can be no takeover of BSkyB by the Murdoch family - I use the term in the Corleone sense.
A broadcaster, by law, must be a "fit and proper person". James Murdoch's admissions - mercilessly dissected by Tom Watson under parliamentary privilege last week - amount to a level of self-incrimination which doesn't just disqualify him from the takeover but may lead to his criminal prosecution on both sides of the Atlantic.
If Murdoch really did what he did "without knowing the full facts", he's not a fit person to own a TV station. And if he did know the "full facts", he's not a proper person to be so.
Murdoch - a foreign citizen who pays virtually no tax on his billions of pounds of earnings from this country - must have his empire broken up.
In future, no one can be allowed to concentrate such media power as he - with which police and politicians can be purchased through greed or fear or both.
It should be illegal to own both a national television station and a national newspaper or to own more than two national newspapers - a daily and a Sunday. Taxes on media earnings in Britain should be paid in Britain, not sheltered in the Caribbean.
Those unfairly maligned - a matter to be adjudicated by a wholly independent revamped Press Council with teeth - should have the right of reply, with equal prominence, to their traducers, and on the same page on which they were attacked.
Ofcom, until now a patsy of the government of the day, should be scrapped and a new independent regulator, less concerned with swearing before the watershed and more concerned with plurality - letting a thousand TV and radio stations bloom - established.
Would it surprise you that the man upon whom more than any other Ofcom investigatory man-hours have been expended over the last five years is not a Murdoch, nor Rebekah Brooks... but George Galloway? On account not of anything I've done wrong presenting my TV and radio shows but of having spoken truth to power just a bit more roughly than they're comfortable with.
State censorship you see - imposing what Dr Johnson called the "dictatorship of the prevailing orthodoxy" - is an even worse vice than the private squalor we are witnessing now.
Statutory regulation of the Press could pave the way towards real dictatorship. Privacy laws could erect walls around the rich and powerful behind which they could conspire to rob, cheat and ruin the rest of us.
We need more freedom in the media, not less. Some journalists will use that freedom to follow Ryan Giggs's fingertips wherever they want to stray, it's true. But others, the best of them, will follow more important trails.
And that's where we come in. You see, in a democracy, to an extent we will get the media we deserve.
That many of our citizens chose Murdoch's soiled, foul, dank handiwork day and daily and exchanged hard-earned money for it tells us more than is easy to bear about our country.
In no other country have such low standards made such high profits. And that's the melancholy news not of the world but of too many of us.
Having said all that, it's only fair to take off my hat to the performance of Sky News during this extraordinary week.
For forensic broadcast journalism, absolute absence of partisanship towards their own proprietors, length and scope and depth of coverage, this was their finest hour.
If a scandal about the BBC on anything like this scale had broken, you can be sure the cowed automatons of the state broadcaster would have sunk before the challenge.
Sky beats the big Auntie pants off the BBC virtually every day but in the last week it really has been soaraway stuff.
In such a shameful week for the Murdoch empire, what an irony.