Samsung's 20 June event will reportedly include the launch of the Galaxy S4 mini.
Citing a "person with knowledge of the matter," the Wall Street Journal said in a follow-up that the Galaxy S4 mini will indeed be among the Galaxy and Ativ devices that Samsung is scheduled to show off next month in London.
Samsung's Galaxy lineup focuses on Android devices, while the Ativ brand - unveiled at IFA 2012 - has focused on Windows-based gadgets.
Samsung has already dabbled in "mini" versions of its flagship smartphones. In October, it unveiled the Galaxy S3 mini, which sported a 4in Super AMOLED display with a WVGA resolution of 800 x 480. That's the same screen size as the iPhone 5, but smaller than the Galaxy S3's 4.8in display.
For now, Samsung seems to be doing just fine with the larger, 5in Galaxy S4.
On Thursday, the company confirmed that sales of the new smartphone had topped 10 million units globally, less than one month after its debut. In fact, it took the uber-popular Android phone just 26 days to reach the 10 million-sold milestone, making it Samsung's fastest-selling smartphone to date.