Kanye West's Sunday Service at Joel Osteen's Church Requires Tickets

Kanye West's appearance at Joel Osteen's megachurch this Sunday is expected to draw overflow crowds ... and the folks at Lakewood Church are scrambling to avoid pandemonium.

We've learned the Church has contacted Ticketmaster and will offer tickets Friday for the first 45,000 takers. It will be strictly first come, first served, and the tickets are free.

Here's the catch. Tickets will only be available for the evening service, where Kanye and his choir will perform their already iconic Sunday Service. As we've first reported, there's an earlier service at 11 AM, where Ye will walk up to the pulpit and have a 20- to 30-minute conversation with Osteen. The 11 AM service will not be ticketed ... the first 45,000 who arrive get seated.

As for what Osteen will talk to Kanye about ... we're told the focus is how Ye found and embraced God.

As for Kanye's Sunday night Sunday Service ... our sources say Osteen's church provides top-of-the-line sound and lighting equipment but might need to find a way to make its stage bigger to accommodate the rapper's 100+ choir members. One source says the choir will be 120 strong.

We're also told the church has an overflow room if the crowd's too big ... and it will almost certainly be utilized.