Cheese-loving Heather Trott's (Cheryl Fergison) shock pregnancy in the BBC soap has sparked the show's latest whodunnit and the market has today been formed as to the perpetrator.
Heather's ex-husband Minty Peterson (Cliff Parisi) is the favourite at 2/1, while Eddie (Will Chitty), the mystery man she met in R&R in February, is second favourite at 3/1.
Phil Mitchell (Steve McFadden) ranks at 5/1 and Darren Miller (Charlie G Hawkins) stands at 6/1. Garry Hobbs (Ricky Groves) and Vinnie Monks (Bobby Davro) are 8/1 shots, while Vinnie's son Callum (Elliott Jordan) is the rank outsider at 16/1.
Unlucky-in-life Billy Mitchell (Perry Fenwick) joins Christian Clarke (John Partridge) at 10/1, with taxi driver and head of the Slater clan Charlie (Derek Martin) at 12/1.
A Ladbrokes spokesman said: "Minty and Heather have got previous and as a result, it's Walford's loveable mechanic who leads the way. But EastEnders chiefs love a twist and the rest of the field aren't too far behind."
It is believed that Heather conceived after a night out in R&R back in February. After suffering an asthma attack two months later, she was stunned when the doctor revealed that she was pregnant after a series of routine tests.
Earlier this month, Shirley Carter (Linda Henry) followed Heather to the hospital, where she was gobsmacked to rumble her best friend's secret.
> Poll: Who's the Daddy in 'EastEnders'?
> 'Who's the Daddy?' poll results