Dundalk will face Polish team Legia Warsaw as they aim to become the first League of Ireland team to reach the Champions League group stage.
The full UEFA Chanpions League Play-Off draw is as follows:
Ludogorets v Plzen
Celtic v Hapoel Beer Sheva
FC KCopenhagen v Apoel Nicosia
Dundalk v Legia Warsaw
Dinamo Zagreb v FC Red Bull Salzburg
Steaua Bucuresti v Man City
FC Porto v Roma
Ajax v Rostov
Young Boys v Borussia M'gladbach
Villarreal v Monaco
Ties to be played August 16/17 and 23/24.