Gemma Arterton is Grimmy's special guest.
Shailene Woodley is on the show, plus a big Game of Thrones competition!
Dermot O'Leary drops in to talk Comic Relief.
Maisie Williams is on the phone, plus Grimmy unveils the 2015 Comic Relief single.
Dan Walker pops in to talk about the FA Cup, plus it's Friday - must be The Nixtape!
Russell Tovey and his dog, Rocky are Grimmy's special guests.
Years & Years drop in on the show, plus there is something big for Neighbours fans!
Shawn Mendes and Bob Odenkirk, aka Saul from Breaking Bad, both on the show!
Olly Murs goes busking, plus Ellaoke with Ella Henderson!
Double Brit Award-winner Sam Smith joins Nick, plus it's Friday - must be The Nixtape!
Grimmy relives the highs and lows of the Brits
Nick has the final of Radio 1's big Brits competition!
Ed Sheeran co-hosts with Grimmy, plus Taylor Swift drops in!
Jim Parsons from The Big Bang Theory talks about his new film, plus David Guetta drops in.
Naomi Campbell adds some glamour and Natalie Cassidy gives us the goss from Eastenders
Grimmy has a chance for listeners to meet the Hollyoaks cast and get a tour of the set.
Kelly Clarkson is probably the best guest ever
Grimmy plays Call or Delete with Ne-Yo. This could be interesting...
Fifty Shades of Grey star Jamie Dornan and Florence Welch join Nick for a big show!
Dan of Dan & Phil fame drops in to talk about the special anti-bullying Internet Takeover.
Nick has a chance to win tickets to see Taylor Swift in Glasgow.
Nick Jonas plays Call or Delete with Grimmy.
Tanya Burr pops in with some vlogging tips for #Fiella.
Rochelle Humes rounds off the Comic Relief co-hosts, plus Nick catches up with Rita Ora.
Keith Lemon co-hosts the show with Nick and the team. It could get silly!
Alan Carr co-hosts the show with Grimmy, plus Ne-Yo pops in!
Douglas Booth co-hosts for Comic Relief & Greg James is live from Uganda.
Richard Hammond joins Grimmy for the first in a week of Comic Relief co-hosts.
Rosie Huntington-Whiteley pops in, plus it's Friday - must be The Nixtape!
Ellie Goulding joins Grimmy to talk about her song in the 50 Shades of Grey movie.