Phil Robertson's eldest son joins 'Duck Dynasty' for season 4

You may not know who Alan Robertson is, but come August 14 when “Duck Dynasty” returns for its fourth season on A&E, he’ll be a household name.

The full-time Louisiana pastor is leaving the pulpit to join his family as the newest cast member of the hit reality series. Alan, 47, will manage public relations and speaking engagements for his parents, Phil and Kay Robertson, his Uncle Si and the rest of the family.

Alan told the New York Post he decided to sign up for his family’s reality show so he could spread his religious beliefs to a larger audience.

“What I do for our church — you see, it’s a pretty good-sized church — impacts a lot of people, but because of my association with the show, I’ll get to minister to a lot more people,” Alan told The Post.

And he noted that one thing that separates him from the other male members of his family is his clean shaven face.

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“The beards are so iconic,” Alan told The Post. “All this time I’ve been flying under the radar; I can go to Starbucks and get Mama coffee.”

“That is about to change,” Phil added of his eldest son.

The Robertson family has gained fame, and lots of attention, since “Dynasty” began airing, something Alan admitted he may not be fully prepared for.

“My children are grown, but all of my brothers’ children are teenagers now, so how is this crazy world going to impact them?” Alan told the newspaper. “We think about John Luke and Sadie, who are such a big part of the show and they’re teenagers, you know? They need to be just normal teenagers. We pray about that.”

Click here for more on the latest “Duck Dynasty” cast member from The Post.