The redshirt junior and Towson transfer could factor into the Terps' rotation after missing all of her first year in College Park.
Coach Brenda Frese has used the transfer portal to great effect over the last two seasons.
Miller averaged 19.7 points, 6.4 rebounds and 2.9 assists in her senior season with the Terps.
The Terps' season ended to the top-seeded team in the country.
Miller and Sellers combined for 30 points in the second half against the Fighting Irish.
The Terps will face No. 3-seed Notre Dame, which defeated Mississippi State earlier Sunday, in their 11th Sweet Sixteen appearance under coach Brenda Frese.
The Terps play Arizona at 5:30 p.m. Sunday.
Some Terps aren't used to a No. 2 seed in the NCAA tournament, while others expect nothing less.
The Terps were outlasted by the Hawkeyes despite tying up the game late.
The Terps hold aspirations of deep Big Ten and NCAA tournament runs.