Removing underline style of autocomplete in react material ui component

Just adding another answer for material v1. In v1 we have to target the input inside the text field. in order to remove or style the underline

<TextField       
    defaultValue="hello"       
    InputProps={{
       disableUnderline: true
    }}
/>

Minor update to @Liem's response. Just putting the InputProps directly overwrites the InputProps it would use by default, which breaks the component. By merging the disableUnderline with the other InputProps, it should work.

<Autocomplete
   renderInput={
     params => 
       <TextField 
         {...params} 
         InputProps={{...params.InputProps, disableUnderline: true}}
       />
   }
 />