The layup capped a stunning 23-point comeback for the Bruins, who erased an 11-point second-half deficit.
Eric Dailey Jr. led six Bruins in double figures with 20 points, while freshman Keaton Wagler had 19 points for Illinois.
Donovan Dent hit a go-ahead layup with 1 second remaining in overtime to secure a 95-94 victory for UCLA over No. 10 Illinois.
The layup capped a stunning 23-point comeback for the Bruins, who erased an 11-point second-half deficit.
Eric Dailey Jr. led six Bruins in double figures with 20 points, while freshman Keaton Wagler had 19 points for Illinois.