Nested Quick Create

The quick create form, introduced in CRM 2013, now has nesting. Consider creating an account using Quick Create. You complete the account name and then tab to Primary Contact. You can click the lookup and then +New. Instead of the regular form for a contact you will get the Quick Create form which you complete and then go back to the Quick Create for the account.

Release Introduced On-Premise: 
Release Introduced Online: