The Nigerian striker has passed a medical and completed a move to The Hawthorns in a deal worth a reported £10 million.
Brown was omitted from Stephen Keshi's 23-man World Cup Squad, but his goal-scoring record of 33 goals in 74 games for Ukrainian outfit Dynamo Kiev was enough to convince Irvine of breaking West Brom's previous club record fee of £6m of which they paid for Stephane Sessgnon last summer.
The Midlands-based club announced the news on their website.
A statement read: "ALBION have signed Nigeria international striker Brown Ideye from Dynamo Kiev for a club-record transfer fee.
"The 25-year-old has put pen to paper on a three-year contract, plus a further year’s option in the club’s favour, after agreeing personal terms and passing a Hawthorns medical. Ideye will wear the No.9 shirt and becomes the Baggies’ fifth summer signing.
"His undisclosed transfer fee surpasses the amount Albion agreed with Sunderland for Stephane Sessegnon last summer."
Albion head coach Alan Irvine said: "Brown is a quality striker and I'm looking forward to working with him.
"He's a strong, quick, powerful player who likes to get in behind defences and has plenty of Champions League and international experience."
- Sports & Recreation
- Dynamo Kiev
- Stephen Keshi
- Brown Ideye