The story is set at the English mansion of the socially prominent Chichester family, whose lives are changed by the introduction of an Irish-American heiress into their midst.

It was a huge success there, playing over 600 times through May 1914, establishing new records "for longest consecutive run of any comedy in New York City" and continuous performances by a female star.

[1][5] Morosco had announced a prize to write a song for the play in March 1912;[6] a year later the winner Peg o' My Heart was released, also to popular success.

[8] The play had a moderately successful Broadway revival from February through April 1921, and was the basis for a 1922 silent film and a 1933 musical.

Lead Supporting Featured Canine Off stage Act I (Drawing room of Regal Villa, the Chichester mansion in Scarborough, on June 1st.)

Peg is fetched back from the servants' rooms to appall her relatives with her outspoken ways, dowdy clothes, and weatherbeaten mutt.

A summer storm begins, and Peg is frightened by Jerry coming in through the French windows from the garden.

He then informs the family that their bank has reopened and their capital is secure, so Peg's sinecure is no longer needed.

(Curtain) The play was written in 1911,[8] while the first public mention came in January 1912, when The Los Angeles Times noted Morosco had secured it for early local production by his Burbank Theatre stock company.

[10] Her leading man was to be Henry Stanford, brought out to Los Angeles from Broadway, where he had been playing in a revival of Monsieur Beaucaire with Lewis Waller.

[11] Peg o' My Heart had its first public performance as a Sunday matinee at Morosco's Burbank Theatre[fn 3] on May 26, 1912.

Peg a la Taylor is bigger than the play surrounding her", and he called her "one of the subtlest comediennes on our stage today".

Originally scheduled for an eight-week run,[2] the production was still attracting standing-room only crowds at eleven weeks when forced to close on August 3, 1912, to make way for Richard Bennett in The Deep Purple.

[3] The Broadway premiere for Peg o' My Heart had long been scheduled as the inaugural work for the new Cort Theatre.

[16] Laurette Taylor and J. Hartley Manners confirmed their engagement on November 2, 1912, but said the wedding would have to wait until after the Christmas holidays as they were too busy with play preparations.

[17] Peg o' My Heart premiered at the Cort Theatre on December 20, 1912, with only Emelie Melville (Mrs. Chichester) carried over from the Los Angeles cast.

[18] Reviewers devoted some of their space to the aesthetics of the newly opened theatre, but their general conclusions mirrored the earlier critics, that the play was all Taylor.

[4] Laurette Taylor was hailed by The New York Times for having never missed a single performance, which it called "a world's record for a female star".

[20] Peg o' My Heart was given a revival by producer Abe Erlanger at the Cort Theatre starting February 14, 1921.

During March 1912, two months before Peg o' My Heart opened, Morosco announced a $1000 prize for a song to complement the new play.

[22] Manners first adapted his play to short story form in March 1913 for the magazine of The Sunday World.