The Swell Head

The Swell Head (also known as The Swelled Head and Eddie Foy, Jr., with Bessie Love in The Swelled Head) is a 1928 American romantic musical short starring Eddie Foy Jr. and Bessie Love, directed by Foy's brother Bryan. "Variety" mused that "this may be the first backstage sound short."
The film is preserved at the UCLA Film and Television Archive.
Plot.
A young man (Foy) and woman (Love) perform a vaudeville act multiple times a day. The young man's ego makes their collaboration difficult. When he is made aware of this, he changes his ways, and the pair fall in love.
Production.
A plagiarism lawsuit was filed against the studio.
Release and reception.
Though it was a short film, because it was a sound film, it headlined at some theaters. The film had its New York premiere at the Strand Theatre.
Foy and Love received high praise for their performances, and the film left open the possibility for sequel shorts.