Billie Eilish and Nat Wolff are fuelling romance speculation ... appearing in notable roles such as in The Fault in Our Stars in 2014, the lead in Paper Towns in 2015, and Death Note in 2017 ...

The Happier Than Ever singer and her alleged beau Nat Wolff is seemingly enjoying ... that the Birds of a Feather singer and The Fault in Our Stars actor "were playing pool and were affectionate ...