Mr McMullen, 29, of Beech Court, Workington, was pronounced dead on January 7 after he was found injured at his home around 7.30am.
A service was taking place at St Michael’s Church at 11am today followed by interment in Salterbeck Cemetery.
Calvin Patrickson, 22, of Newlands Gardens, appeared before a judge at Carlisle Crown Court earlier this month accused of Mr McMullen’s murder.
A provisional trial date was set for June 26.
The defendant was remanded in custody until his next hearing.
He was not asked during the hearing to enter his plea.
A second man was also arrested in connection with Mr McMullen’s death and was released on bail until February 17.
The 24-year-old, of Workington, was arrested on suspicion of assisting an offender.
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