Katherine Jenkins, Mystery Jets, The Coral and Norfolk native Mullally are just a few of the new acts added to this year's Latitude line-up.
The 1975, Mumford and Sons and Fleet Foxes will be joined at Henham Park in Southwold this summer by classical and mezzo soprano superstar Katherine Jenkins.
Jenkins will make her debut at the family-friendly festival with a lakeside performance on Sunday 16 July.
Alongside Jenkins, Gospel and soul singer Leon Bridges, best known for album 'Coming home', and English indie rock band, Mystery Jets will also perform.
Local acts Mullally and Jesse Quinn of Keane will also be there.
Previously announced acts include singer-songwriter Jack Garratt and Fatboy Slim, whose hits include 1999 No.1 Praise You and Right Here Right Now.
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The festival, which started in 2006, again boasts an impressive comedy line-up. This year's big names include Dara O'Briain, Katherine Ryan, Simon Amstell, Seann Walsh and Joel Dommett.
MORE: New play starring budding actors at Latitude Festival to explore youth issues
There's more excitement to come as at 10am tommorrow the return of a past headliner will be announced as a special guest. Latitude Festival takes place between 13 - 16 July 2017 at Henham Park, Southwold, in Suffolk. The campsites open from 2pm on Thursday 13 July and close at 1pm on Monday 17 July. For day ticket holders the arena opens at 10am and closes at 3am. For more info click here.
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